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.

or dehydration, persistent muscle spasms can sometimes be linked to neurological, musculoskeletal, metabolic, postural, or stress-related medical conditions.

People sometimes refer to neurological conditions that cause dystonia (involuntary movement) as “dystonias.” There are many types, and they can affect people of different ages and in different ways.

Dehydration may be one cause of muscle cramps, and some evidence suggests that electrolyte imbalances also contribute to them. Muscle cramps are painful, involuntary contractions of the muscles that ...