Muscle spasms

Muscle spasms are sudden, involuntary contractions of a muscle or group of muscles. They can range from mild twitches to severe, painful cramps. Symptoms usually start with an area of tightness or a knot in the muscle, followed by a sudden and forceful contraction. Spasms can be caused by dehydration, electrolyte imbalances, muscle fatigue, or nerve dysfunction. Treatment may include stretching, massage, and medications.