Scary Symptoms: Your source for in-depth symptom information since 2012. Thousands of articles covering hundreds of medical, health and fitness topics including the scariest symptoms.

How Low Must Ejection Fraction Be for Congestive Heart Failure?

Find out what the cut-off point is for when ejection fraction could be low enough to mean congestive heart failure. People with congestive heart failure have a low ejection fraction, but does a low ejection [...]

2025-11-22T20:34:01-07:00EJECTION FRACTION, HEART FAILURE|

Sudden Onset Transient Double Vision: Get to ER

Just because your sudden-onset double vision disappeared after a few minutes doesn’t mean that the cause can’t kill you. There are many causes of double vision (diplopia), but sudden-onset, transient double vision is a different [...]

What Causes INTERMITTENT Muscle Twitching?

This article is about the causes of intermittent muscle twitching (fasciculations), not spasms. Intermittent muscle twitching (fasciculations) is not the same phenomenon as spasms. If you’re wondering what can be causing intermittent twitching of your [...]

Causes of Twitching in Neck and Shoulder Muscles

A neurologist explains what may be causing twitching in your neck and shoulder muscles. Have your neck and shoulder areas been twitching lately? “For almost everyone – particularly young healthy persons -- a simple twitch [...]

Cause of Muscle Twitching in Arms: Biceps & Triceps

A neurologist answers what could make the arms twitch and whether or not the twitching is a worrisome symptom. Do your arms (namely biceps and triceps muscles) twitch? “Many people experience annoying twitching of the [...]

Muscle Twitches During Sleep that Aren’t Myoclonus Jerks

Find out about regular muscle twitching during sleep or shortly before, not the “jerks” of myoclonus... This article is about regular muscle twitching as one falls asleep or during sleep, not the jerking movements that [...]

Visible Muscle Twitches: Why You Can See Them, What It Means

A neurologist explains why some muscle twitching is visible and if there’s a difference between ones you can see and hidden fasciculations. Have you been wondering if being able to SEE a muscle twitching has [...]

Cause of Muscle Twitching in Quads from Lifting Weights

A neurologist explains exactly what makes the quad muscles twitch after a workout of squats, deads or whatever leg workouts you do. You trashed your quads in the gym and now they’re twitching like mad; [...]

Can Muscle Twitching from Lifting Weights Mean a Disease?

If you’ve noticed that lifting weights triggers muscle twitching in the muscles you worked, find out if you should be worried about this. So you go into the gym and lift weights hard, feeling like [...]

Beeturia Q & A: Worried About Beets in Urine and Stools?

A Gastroenterologist Answers Questions About Beeturia If what you see in the toilet after eating beets alarms you, here are some responses from Mervyn D. Danilewitz, MD, FACG, a board certified gastroenterologist based in Philadelphia, PA. [...]

2026-05-14T18:29:09-06:00BEETURIA, STOOL COLOR|

Heartbeat Problems: Thumping, Fluttering, Racing, Pounding Pulse, Etc.

Feeling your heart racing, skipping, pounding, thumping, jumping can be so scary. Even after doctor after doctor tells you "you're fine" and that "nothing is wrong," feeling a lot of things going on with your [...]

2025-11-11T15:23:42-07:00FLUTTERING HEARTBEAT|
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