Why do muscles suddenly tighten and become painful, and what can I do to relieve a muscle cramp?

A muscle cramp is a sudden, involuntary, and often painful contraction of a muscle. It commonly affects the legs, especially the calf muscles, and may last from a few seconds to several minutes.

Cramps can happen after intense physical activity, dehydration, prolonged sitting or standing, or muscle overuse. In some cases, certain medications or medical conditions may also contribute.

When a cramp occurs, try to gently stretch and massage the affected muscle. For a calf cramp, slowly straighten your leg and pull your toes toward you. Applying gentle heat may also help relax the muscle.

Staying well hydrated and regularly stretching your muscles—particularly before and after exercise—may help reduce the likelihood of cramps.

If cramps are frequent, severe, prolonged, or associated with swelling, weakness, numbness, or other unusual symptoms, it is important to consult a healthcare professional to identify the underlying cause and to identify the corresponding treatment.