Deep Vein Thrombosis (DVT) Prevention: 7 Lifestyle Changes
Making lifestyle changes to help prevent a DVT is as easy as 1 through 7.
Deep vein thromboses are much more common than you think and are very dangerous, requiring immediate medical intervention.
“The problem isn’t the formation of the clot in the leg (although it is painful and causes significant morbidity such as swelling of the leg),” begins Susan L. Besser, MD, with Mercy Medical Center, Baltimore; Diplomate, American Board of Obesity Medicine and board certified by the American Board of Family Medicine.
“The real risk is if the clot breaks off from its location in the leg and travels to distant parts of the body,” continues Dr. Besser.
“Once there, it can lodge in a blood vessel and cause that blood vessel to block. If there is no blood flow — that area of the body ‘starves from the lack of blood.
“The most common site for the clot to travel is the lungs (pulmonary embolus). That causes the lungs to work less efficiently — so less oxygen (a necessary substance for life) is absorbed.
“It is also possible for a small clot to pass through the lungs and lodge in a heart blood vessel which can cause a heart attack, or into the brain which can cause a stroke.”
You can now clearly see why making lifestyle changes to prevent a DVT is so crucial to one’s overall health regimen.
Even athletes can get a DVT. This disorder is not reserved just for the old and sick!
A DVT is a very preventable condition, even though a pulmonary embolism kills a person in the U.S. approximately every five minutes.
Big Steps Towards Preventing DVT
These ways to help prevent a DVT come from research that was presented at the Arteriosclerosis, Thrombosis and Vascular Biology 2013 Scientific Sessions.
- Exercise
- Don’t smoke
- Eat healthfully
- Avoid being overweight
- Control blood sugar level
- Control blood pressure
- Control cholesterol
These seven lifestyle factors go a long way in preventing DVT.
A study followed over 30,000 adults 45-plus for 4.6 years. Blood clot incidence was compared among three groups:
1) inadequate heart health
2) average heart health
3) optimal heart health.
Blood Clot Risk in the Study Subjects
- 44 percent lower in those with optimal heart health when compared to inadequate heart health.
- 38 percent lower in those with average heart health when compared to inadequate.
Out of the seven, what were the top two as far as greatest effect on lowering DVT risk? Exercise and weight control.
Shutterstock/wavebreakmedia
So now you have even more motivation than ever to lose body fat and stay on an exercise program. Exercise should include strength training.
And please, don’t assume you have an automatic built-in exercise regimen just because you do housework or have a staircase in the home.
A deep vein thrombosis is a lot more powerful than household chores!
Do your part in helping prevent the development of a DVT by following the seven lifestyle changes here.
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- Abdominal surgery — recent
- Age over 60
- Airline travel — prolonged
- Bedrest — extended
- Birth control pills
- Cancer (active malignancy)
- Chemotherapy
- Chronic heart failure
- Chronic kidney disease
- Chronic venous insufficiency
- Dehydration
- Factor V Leiden mutation
- Family or personal history of DVT
- Fracture, major trauma
- Heart attack
- Hormone replacement therapy
- Joint replacement surgery: recent
- Obesity or moderate overweight
- Paraplegia or quadriplegia
- Pregnancy — current
- Sedentary lifestyle
- Sitting excessively most days
- Smoking, chewing tobacco
- Ultra-processed food diet and lastly, varicose veins
Dr. Besser provides comprehensive family care, treating common and acute primary conditions like diabetes and hypertension. Her ongoing approach allows her the opportunity to provide accurate and critical diagnoses of more complex conditions and disorders.
Lorra Garrick has been covering medical, fitness and cybersecurity topics for many years, having written thousands of articles for print magazines and websites, including as a ghostwriter. She’s also a former ACE-certified personal trainer.
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Source: sciencedaily.com/releases/2013/05/130502185419.htm
ABDOMINAL AORTIC ANEURYSM: Surgery, Drugs, Watchful Waiting
An abdominal aortic aneurysm is a very serious condition, but not all cases require treatment.
The aorta is the largest blood vessel in the body.
It comes out of the heart and travels all the way down the abdomen, where it branches off to feed blood to the lower extremities as well as organs, especially the liver and kidneys.
Usually, a bulging section of this great vessel is discovered by accident, when the patient is imaged for an unrelated cause.
For example, he might undergo an X-ray covering the abdominal region for an unrelated issue, and the ballooned portion of the aorta is picked up on the study.
Treatment for an Abdominal Aortic Aneurysm
If the vessel is only mildly dilated, the treatment will be ongoing surveillance via imaging studies to track the growth of the aneurysm.
“If you have been diagnosed with an aortic aneurysm and have been told to simply observe symptoms, know what symptoms you should be looking for,” says Walter Gaman, MD, FABFM, board certified in family medicine and the author of several award-winning books including “Age to Perfection: How to Thrive to 100, Happy, Healthy, and Wise.”
“This will allow you to recognize a serious change in your condition.”
The symptoms may be abdominal pain, back pain, a bulge in the lower abdomen and/or feeling a throbbing pulse in the lower abdomen (without actually touching the area with your fingertips).
“Also, share these symptoms with your family members so they will know how to react in case of an emergency,” says Dr. Gaman.
If the aneurysm ruptures, the pain will be sudden and agonizing, capable of bringing the person to the floor.
“Alerting medical personnel early will help your chances of survival. The most common symptom is intense pain in your abdomen, side, or back.”
The excruciating pain of a ruptured abdominal aortic aneurysm may be the person’s first symptom.
The mortality rate is very high due to the rapid internal hemorrhaging. Below is a graphic image of an actual AAA.
Hertzer NR, CC
Risk Factors
- Male gender
- Over age 70
- Smoking
- High blood pressure
- Family history of AAA
Ongoing Surveillance
“Aortic aneurysms should be monitored yearly,” says Dr. Gaman. “If they get to or above five to six cm in diameter, surgical intervention may be necessary.”
Sometimes, though, when an abdominal aortic aneurysm is discovered, it’s already at a life-threatening size, and the diseased portion must be repaired asap.
The repair may be done invasively by opening up the abdomen, or, it may be done endovascularly, which means a shorter recovery time and lower risks of complications.
Dr. Gaman is with Executive Medicine of Texas and is with the Staying Young Radio Show 2.0 podcast.
Lorra Garrick has been covering medical, fitness and cybersecurity topics for many years, having written thousands of articles for print magazines and websites, including as a ghostwriter. She’s also a former ACE-certified personal trainer.
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Top image: Shutterstock/Alila Medical Media
Peripheral Neuropathy Misdiagnosis: Doctors Miss Disease
Just because doctors haven’t mentioned peripheral neuropathy as the cause of your pain, doesn’t mean you can’t have it.
“Peripheral neuropathy” means disease of the nerves of the peripheral nervous system, and I know at least one person who’s been recently diagnosed with this — after it was missed for the past four years by a steady stream of doctors: my father.
For about four years he’d been complaining of pain in his legs, and several doctors attributed this to problems with his low back, including spinal stenosis. Two endoscopic back surgeries didn’t help.
Another doctor said it was from osteoarthritis of the hip and recommended a hip replacement, which my father had; it did no good.
He’s had three knee replacement surgeries by two orthopedic surgeons who both said that the leg pain was caused by osteoarthritis in his knees.
The second surgeon, who did the third knee surgery (a revision) said that the pain could very well be from a failed knee replacement.
What seems to make it easy for doctors to miss peripheral neuropathy is when the patient actually has these other conditions, which are easily proven with X-rays and MRIs.
My father has had more than one primary care physician over this time period, who named back and knee problems, as well as old age, as probable causes of the leg pain.
Other proposed explanations for the leg pain was a knee infection, and allergic reaction to the knee replacement device.
Early on, an adverse side effect to my father’s use of a statin drug was suspected, but ruled out after he went off the statin but the leg pain continued.
Strangely, none of these many doctors came up with, “You know, this very well could be peripheral neuropathy. Let’s aggressively pursue this possibility.”
Peripheral Neuropathy Doesn’t Necessarily Work Alone
If you have degenerated knees or lumbar discs, this doesn’t mean you can’t also have peripheral neuropathy adding to your lower body pain, burning and tingling.
Peripheral neuropathy is associated with diabetes; diabetes is the most common cause.
A doctor may rule out peripheral neuropathy if you don’t have diabetes (my father doesn’t), and especially if you have other “differentials” that can explain the leg pain, such as degeneration of the lumbar spine as shown on imaging tests.
How did my father finally get diagnosed with peripheral neuropathy?
His assortment of doctors would have continued to miss this had he himself not decided one day to review his medical records over the past four years.
He’d had an EMG about three years ago and the doctor said he had “nerve damage.” However, that doctor, plus his primary care doctor at the time, didn’t further pursue this “nerve damage,” and thus, my father had thought nothing of it.
My father found the words “peripheral neuropathy” in the paper work as a diagnosis, and was floored that nothing ever came of this; no further workups or recommended drugs.
He immediately contacted his newest PCP, who in turn ordered blood tests to rule everything else out.
Within 24 hours of the blood tests, my father was prescribed Nortriptyline, a tricyclic antidepressant that’s also used to suppress the pain of peripheral neuropathy.
At the time of this writing, he has not yet gotten the prescription because it was ordered late Friday afternoon.
Why, after four years, did so many doctors not think of peripheral neuropathy?
And why didn’t the EMG neurologist pursue it? It’s because sometimes, the patient knows more than their physician.
Lorra Garrick has been covering medical, fitness and cybersecurity topics for many years, having written thousands of articles for print magazines and websites, including as a ghostwriter. She’s also a former ACE-certified personal trainer.
Top image: Shutterstock/BEAUTY STUDIO
What’s the Death Rate of Abdominal Aortic Aneurysm Repair?
The death rate following the repair of an abdominal aortic aneurysm is something that you’d definitely want to know.
However, if your doctor is already discussing surgical treatment with you, it’s a safe bet that it would be very dangerous to decline surgery.
After all, the aneurysm in your abdominal aorta is at high risk of rupturing, and the internal bleeding from that can be fatal in minutes.
All invasive surgeries do carry risks, and surgeons always weigh the benefits of the surgery against the risks of going without it.
The case of an abdominal aortic aneurysm is no exception to this standard of medical practice. Below is a graphic image of an actual abdominal aortic aneurysm. This particular AAA had not been repaired, as is evident.
Hertzer NR, CC
“Most randomized control trials indicate the 30-day perioperative mortality for elective repair of abdominal aortic aneurysm is about 5%,” says Seyed-Mojtaba Gashti, MD, a board certified vascular surgeon with Broward Health Medical Center in Florida.
“This is major surgery and presence of a AAA is a marker for other significant cardiovascular disease. As a matter of fact, beyond the 30-day, most people die from other cardiovascular causes, such as MI, CVA, etc.”
MI = myocardial infarction (heart attack).
CVA = cerebral vascular accident (stroke).
It is advised that men over the age of 70 be screened for the presence of an abdominal aortic aneurysm.
In addition to male gender and older age, high blood pressure and smoking are risk factors.
Dr. Gashti specializes in the diagnosis and treatment of vascular disease including abdominal and aortic aneurysm. He received his medical degree from University of New England College of Osteopathic Medicine and has been in practice for more than 20 years.
Lorra Garrick has been covering medical, fitness and cybersecurity topics for many years, having written thousands of articles for print magazines and websites, including as a ghostwriter. She’s also a former ACE-certified personal trainer.
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Top image: Shutterstock/Sakurra
How Long Does It Take DVT to Get to Lungs After Breaking?
A DVT (blood clot) that’s in your leg has a chance of breaking apart or completely dislodging and then going to your lungs…and how long this takes is not what you may think it is.
I was reading in a health anxiety forum a lengthy thread that was started by a person who’d been at her computer for “three days” googling things relating to health — but not DVT.
She took breaks only to use the bathroom, catnap here and there, maybe eat a little something, but essentially it was a marathon at the computer for three days.
Upon getting up at the end of the computer stint, she felt a pain in her calf and googled this, learning that marathon sitting at a computer can cause a blood clot.
She then freaked out, convinced that there was a DVT in her calf. She kept making posts in the thread over a 45 minute period, corresponding in the then-real-time with a few other caring health anxiety sufferers.
At some point she then said the pain had moved up to her knee and was panicking that the DVT had broken off and was on the way to her lungs.
This post was maybe 10 minutes after the first one.
Then 15 minutes later she made a post that her thigh was hurting, and could the DVT then be in her thigh on the way to her lungs?
Shutterstock/solar22
What a Vascular Surgeon Says
According to the times these posts were made, 15 or so minutes had lapsed between the onset of the knee pain and the thigh pain.
She was convinced that this meant that the DVT was enroute to her lungs.
When a blood clot gets into a lung, it’s called a pulmonary embolism.
Blood Clot in a Leg: Hare or Turtoise?
So if a DVT breaks off or dislodges from its location in the leg, just how long will it take to get to the lungs and become a pulmonary embolism?
“Generally, it is immediate (do not know the exact time period), but by far the majority remain clinically silent since they can be very small,” explains Seyed-Mojtaba Gashti, MD, a board certified vascular surgeon with Broward Health Medical Center in Florida.
Imagine that you have a DVT anywhere in your leg, and suddenly, a part of it breaks off or dislodges.
This clot material then gets swept up by the venous flow that returns de-oxygenated blood to the lungs.
This is akin to tossing stuff in a river, and the flow of the river carries it downstream.
Of course, veins in the legs pump blood “upstream,” but the principle is the same:
The bits of DVT immediately get carried away with this blood circulation and, like Dr. Gashti says, the time lapse is immediate from when the clot dislodges to when it arrives in the lung (pulmonary artery).
Pulmonary embolism
Think of it this way:
The time it takes for a broken DVT to get to your lungs is the time it takes for the blood in your calf vein, at any given time, to get to your lungs. That’s just seconds.
Though most pulmonary emboli don’t produce symptoms due to being very small, this doesn’t negate the estimated 300,000 U.S. deaths every year to a pulmonary embolism.
A pulmonary embolism is a common event in the U.S. population.
DVT Risks
Recent surgery
Excessive bedrest
Smoking
Obesity
Pregnancy
Extended air travel
Extended vehicular travel
Lack of exercise
Senior age
If you suspect a DVT, and knowing that if it dislodges, the occurrence of a pulmonary embolism will be literally within seconds, don’t delay getting yourself checked out in the nearest emergency room.
A “saddle” type pulmonary embolism, plugging up the area where the pulmonary artery splits off into each lung. This can cause death in minutes. Laboratoires Servier, CC BY-SA/creativecommons.org/Wikimedia Commons
The time between when a blood clot breaks to when it reaches the lungs is a few SECONDS.
Dr. Gashti specializes in the diagnosis and treatment of vascular disease including abdominal and aortic aneurysm. He received his medical degree from University of New England College of Osteopathic Medicine and has been in practice for more than 20 years.
Lorra Garrick has been covering medical, fitness and cybersecurity topics for many years, having written thousands of articles for print magazines and websites, including as a ghostwriter. She’s also a former ACE-certified personal trainer.
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Top image: Shutterstock/ShotPrime Studio
Can You Get a Pulmonary Embolism without a DVT?
Find out the interesting answer to the question: Can a pulmonary embolism form in the absence of a DVT?
“By definition a PE is an ‘embolus’ that has traveled to the lungs,” says Seyed-Mojtaba Gashti, MD, a board certified vascular surgeon with Broward Health Medical Center in Florida.
An embolus is a thrombus (blood clot) that is dislodged from one place and ends up in another.
“It can be both venous and arterial. Of course a pulmonary embolus must have a venous source.”
In other words, in order for a blood clot to end up in a pulmonary artery, it has to travel there somehow, and the only way is via veins (venous pertains to veins).
“I assume that one can form a thrombus de novo [originating from] in a pulmonary artery, but that would not be considered a PE.”
Remember, embolus refers to a blood clot that has dislodged. So if the clot originates in the lungs, it’s not a “pulmonary embolus.”
“Not infrequently a patient has a pulmonary embolus, but a source cannot be found,” continues Dr. Gashti.
“In these cases the possibilities include: thrombus completely broke off from the original vein and therefore none can be found now; thrombus was in a vein in the upper extremity which normally is not studied in a patient with a PE unless clinically indicated, or that it came directly from the right heart (after open heart surgery), after having a heart attack, or from a tumor, i.e., myxoma.”
A myxoma is a rare, usually noncancerous tumor made of soft, jelly-like tissue, and it often arises in the heart, which can sometimes cause blockages or heart problems.
Dr. Gashti specializes in the diagnosis and treatment of vascular disease including abdominal and aortic aneurysm. He received his medical degree from University of New England College of Osteopathic Medicine and has been in practice for more than 20 years.
Lorra Garrick has been covering medical, fitness and cybersecurity topics for many years, having written thousands of articles for print magazines and websites, including as a ghostwriter. She’s also a former ACE-certified personal trainer.
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Top image: ©Lorra Garrick
Can a DVT Cause Swelling in the Ankle Only & Nowhere Else?
How likely is it that the swelling in only one ankle, but nowhere else in the leg, is being caused by a deep vein thrombosis?
A DVT typically causes swelling up and down the lower leg and may include the ankle.
But is it possible for this kind of blood clot to swell up ONLY the ankle?
Can a deep vein thrombosis cause swelling only in a person’s ankle?
“That would be unusual, unless the very distal tibial veins are thrombosed, in which case it would not be of great significance, again because these emboli would be very tiny,” explains Seyed-Mojtaba Gashti, MD, a board certified vascular surgeon with Broward Health Medical Center in Florida.
The distal tibial veins are the veins in the front or anterior of the lower leg where the tibia bone is.
The tibia is the larger of the two lower leg bones. Distal means distant from the center of the body, so in this case, the location would be near the ankle.
Thus, if a DVT forms near the front of the lower leg near the ankle, the clots would be, as Dr. Gashti says, “very tiny,” and thus not potent enough to cause swelling going up the leg, but rather, more likely confining it to only the ankle.
Scientific Animations, Creative Commons/BY-SA
Warning Signs of a DVT Other than Swelling
• One area of the leg is much warmer than the other.
• Area of suspicion is unusually tender to the touch.
• There is pain, even at rest, in the calf or behind the knee. The pain may feel like a strong soreness or a cramp.
• The area is noticeably reddish.
• You very recently had joint replacement or abdominal surgery.
• You’ve recently had excessive bed rest.
• You’ve recently been on a long airplane flight.
Dr. Gashti specializes in the diagnosis and treatment of vascular disease including abdominal and aortic aneurysm. He received his medical degree from the University of New England College of Osteopathic Medicine and has been in practice for more than 20 years.
Lorra Garrick has been covering medical, fitness and cybersecurity topics for many years, having written thousands of articles for print magazines and websites, including as a ghostwriter. She’s also a former ACE-certified personal trainer.
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Top image: Shutterstock/ARZTSAMUI
DVT in Neck after CABG: Shouldn’t Patient Get SVC Filter?
What should be done when a patient gets a DVT in the neck after coronary bypass surgery?
Seems like an SVC filter should be placed?
Following coronary bypass surgery (a.k.a. CABG), it’s possible for a patient to develop a DVT in the neck.
This happened to my mother following her CABG.
“She has a big DVT,” I was told by the nurse after results of the ultrasound came in.
It’s scary to hear that your mother has a “big DVT” in her neck.
DVT stands for deep vein thrombosis. Fragments of, or the entire clot, can break away from where it’s lodged and travel to the lungs. This holds especially true if the clot is in the jugular vein.
In the lungs it could interfere with breathing. Depending on its location, it could cause death very quickly. So of course, knowing all this, I was very worried.
But nothing was done in the case of my mother. They just let it be; no intervention to prevent the clot from traveling to her lungs.
This was extremely worrisome, as her left arm kept getting bigger and bigger from the swelling induced by the DVT.
At the time, I didn’t know about an SVC filter, which is designed to prevent a dislodged portion of a DVT from entering the lungs and becoming a potentially fatal pulmonary embolism.
SVC stands for superior vena cava — a major vein located above the heart.
This vein transports de-oxygenated blood from the upper body to the heart so that it gets re-oxygenated.
After learning about the SVC filter long after my mother had been released from the hospital, I’ve always wondered what the doctors’ responses would have been had I insisted on an SVC filter placement for her.
“Most of these DVTs would be labeled as provoked, most often secondary to central venous catheters,” says Seyed-Mojtaba (Moji) Gashti, MD, a board certified vascular surgeon with Broward Health Medical Center in Florida.
“Generally these are focal and limited to the site of the catheter (most often in the internal jugular vein). These can be watched.
“But if the thrombus extends to the subclavian/innominate veins, then most physicians would consider anticoagulation if there are no contraindications.”
Following CABG, a patient can bleed to death from anticoagulant drugs.
“If anticoagulation is contraindicated, then an SVC filter would be indicated,” says Dr. Gashti.
“The SVC is much shorter than the IVC [inferior vena cava], and therefore placement of a filter in the SVC is technically more challenging. You have to make sure the length is adequate.
“Currently there are no filters in the market indicated for SVC, and if you place one, it would be off label.”
This means, for instance, that a filter that’s designed for the inferior vena cava (IVC, below the heart) could be placed in the superior vena cava.
Thus, the procedure is possible, but the mere presence of a DVT in the neck of a CABG patient won’t automatically mean that an IVC filter will be placed in the superior vena cava. The patient’s condition and other factors will need to be weighed.
Dr. Gashti specializes in the diagnosis and treatment of vascular disease including abdominal and aortic aneurysm. He received his medical degree from University of New England College of Osteopathic Medicine and has been in practice for more than 20 years.
Lorra Garrick has been covering medical, fitness and cybersecurity topics for many years, having written thousands of articles for print magazines and websites, including as a ghostwriter. She’s also a former ACE-certified personal trainer.
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Top image: Freepik/DC Studio
Risk of DVT in People Who Use Wheelchairs
Is deep vein thrombosis common in people who use wheelchairs?
Since prolonged “inactivity” is a risk factor for developing a DVT, the logical conclusion would be that this condition is quite common in people whose legs are completely paralyzed and thus are confined to a wheelchair.
Complete paralysis, for the sake of this article, means that the person cannot move, at all, their lower limbs (such as from a severed spinal cord), versus someone who has a neurological disease (such as multiple sclerosis) and can yield minute movements throughout the day while in a wheelchair.
“Immobility is only one of the three factors leading to DVT; the other two being intimal injury to a vein] and a hypercoagulable state,” says Seyed-Mojtaba (Moji) Gashti, MD, a board certified vascular surgeon with Broward Health Medical Center in Florida.
“In addition I am not sure if we can make the statement that DVT is not common in wheelchair bound people; symptomatic DVT may be.
“Again, majority of these can remain asymptomatic and/or missed. I am not aware of any studies that have looked at this population.”
I did a little searching on this and came up with one study that looked at DVT prevalence in people with late-stage multiple sclerosis who were confined to a wheelchair.
The report is in the April 2010 Thrombosis Research.
The investigation involved 132 patients. Deep vein thrombosis was present in 58 (43.9 percent).
Furthermore, 32 percent had a history of VTE: venous thromboembolism, the term that pertains to the phenomenon of a deep vein thrombosis dislodging and embolizing in the lungs.
The conclusions include that the rate of DVT in late stage multiple sclerosis may exceed 40 percent, and that doctors should “consider the systematic application of long term preventive measures” for this demographic.
Dr. Gashti specializes in the diagnosis and treatment of vascular disease including abdominal and aortic aneurysm. He received his medical degree from University of New England College of Osteopathic Medicine and has been in practice for more than 20 years.
Lorra Garrick has been covering medical, fitness and cybersecurity topics for many years, having written thousands of articles for print magazines and websites, including as a ghostwriter. She’s also a former ACE-certified personal trainer.
How Long After Air Travel Does DVT (Blood Clot) Risk Last?
So you’ve been cramped on that airplane for hours and are finally walking on the ground; how long after will DVT blood clot risk last?
“As far as I know, DVT forms while traveling,” says Seyed-Mojtaba Gashti, MD, a board certified vascular surgeon with Broward Health Medical Center in Florida.
“So once you are no longer in the air and resuming normal activity/oral intake, your risk should be at baseline.”
Do not confuse this with the phenomenon of symptoms of a deep vein thrombosis occurring days after the plane has landed!
Some patients do not make this association, since they believe that a blood clot from air travel would necessarily show symptoms right away.
But this is not necessarily so. Symptoms of a deep vein thrombosis can be delayed enough to seem not connected to the air travel.
DVT Risk Factors
People who have risk factors for a DVT in addition to just having traveled by air for many hours should be on the lookout for suspicious symptoms.
First off, did you stay in your seat nearly the entire time while on the plane? Not good.
How much did you move your legs in that tight cramped space? Did you do lots of ankle, knee and hip movements or pretty much keep everything immobile? Inertia can cause blood to pool in the lower legs.
Did you drink several glasses of water or consume nothing or only alcohol?
Symptoms of Deep Vein Thrombosis
-Swelling in only one leg
-Pain in calve or behind knee; may feel like a cramp
-Redness in calve or at the knee
-Warmth in calve or knee area
-Pain or tenderness upon touching the calve or while walking
Symptoms of Blood Clot Having Traveled to the Lungs: Pulmonary Embolism
Fainting soon after the air flight is suspicious for a blood clot in the lung.
So is sudden chest pain soon after flying.
However, these symptoms may occur days after traveling.