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

Medically reviewed by Jennifer Steinhoff, MD Key Takeaways Muscle twitching is often caused by stress or a lack of sleep and ...

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 ...

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.

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Hemifacial spasms happen when a blood vessel puts excess pressure on a facial nerve, per the National Institute of Neurological Disorders and Stroke (NINDS). They can also be caused by external nerve ...

A review on autoimmune neurological diseases reveals what occurs in our body when the immune system, by mistake, produces ...

After a grueling CrossFit workout on a hot Summer morning that involved kettlebell swings, goblet squats, and about 100 walking lunges, my lower body was toast. But what was weird was that my left ...

Your groin area is the region between your lower abdomen and your upper thighs. A pinched nerve in the groin happens when tissues — like muscles, bones, or tendons — in your groin compress a nerve.