A muscle spasm, also known as a cramp, twitch or charley horse, is the sudden and involuntary forced contraction of a muscle. Experts weigh in on what's behind this sudden discomfort, when to be ...

A muscle spasm, also known as a cramp, twitch or charley horse, is the sudden and involuntary forced contraction of a muscle. Experts weigh in on what's behind this sudden discomfort, when to be ...

That sudden jerk while drifting off to sleep might feel alarming, but it’s more common than you think, and science has ...

Discover the science behind hypnic jerks, involuntary muscle spasms during sleep, and how to manage them effectively.

A muscle spasm — also known as a charley horse, muscle cramp or twitch — is a sudden, involuntary movement in one or more muscles. Common causes include stress, exercise, or dehydration ...

Do you know dystonia and muscle spasms are both conditions that involve involuntary muscle contractions, but they differ significantly in their causes, symptoms, duration, and the way they affect ...

Hemifacial spasm (HFS) is a rare movement disorder that causes involuntary muscle contractions on one side of the face. It typically starts with painless but annoying twitching around one eye.

Hemifacial spasm is a disorder of the nerves and muscles that causes nonpainful involuntary twitching on one side of the face. Many people refer to hemifacial spasms as lip muscle spasms.

Blepharospasm describes a condition where a person experiences an involuntary spasm of the muscles surrounding the eyelid. “Blepharo” refers to the eyelids, while “spasm” describes ...