The muscle twitch creates short, involuntary muscle contractions, which affect tiny muscle areas that lie beneath the skin.

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 ...

The euphoric rush is a culmination of nerve stimulation, muscle contractions and brain chemistry. ‘Rhythmic contractions of ...

Medically reviewed by Nicholas R. Metrus, MD Key Takeaways Too much caffeine can cause lip twitching, and cutting back on ...

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 ...

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 twitching of the ...

Facial paralysis occurs when a nerve that controls your facial movements becomes damaged. As a result, a portion of your face may feel weak, or you may be unable to move it. Some types of facial ...