Add Yahoo as a preferred source to see more of our stories on Google. Many of us have felt a muscle in some part of our body suddenly and involuntarily tighten, causing a twitch or even severe cramp.

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 ...

Shaky hands, or involuntary trembling of the hands, are a common issue that many people often attribute to stress, fatigue, or ageing. While occasional shakiness is usually harmless, persistent or ...

Dystonias are neurological disorders that can cause jerky movements, muscle spasms, repetitive actions, and unusual and awkward postures. Dystonia is a type of involuntary movement, and people ...