Though many people experience muscle twitching, it's often incorrectly identified as a muscle spasm. While both are involuntary contractions of a muscle, muscle spasms and muscle twitching aren't ...

Medically reviewed by Nicholas R. Metrus, MDMedically reviewed by Nicholas R. Metrus, MD Almost all of us will have experienced a fasciculation at one time or another. A fasciculation is simply a ...

You're relaxing on the sofa when suddenly your eyelid starts twitching. Or perhaps it's a muscle in your arm, your leg, or your foot that begins to spasm—sometimes for a few seconds, sometimes for ...

Tweaked by a muscle twitch? From an uncontrollable fluttering eyelid to a pulsing calf muscle, these small, rapid involuntary muscle contractions may happen at any time — and can be annoying. A common ...

We've all been there before. Running along the basketball court or swimming across the pool, when, all of a sudden, we experience a sharp pain in our foot or leg. Muscle cramps are common, affect ...

A sudden eyelid flicker during a meeting. A brief tingling in the foot after sitting too long. A tiny muscle jump just before sleep. These moments often feel random, even unsettling. But the body is ...

Isaacs’ syndrome is a disorder that affects the peripheral nervous system. It’s sometimes classified as an autoimmune disorder, but not always. Some of these terms are used inconsistently to refer to ...

ALS, or amyotrophic lateral sclerosis, is a progressive neurodegenerative disorder affecting the motor neurons in the central nervous system. The early symptoms of ALS include muscle twitching or ...

If the twitching becomes persistent or is associated with other symptoms, it may require medical evaluation by an eye specialist.

MERRF syndrome is a rare genetic disorder that primarily affects the nervous system and muscles. Read more at ...