Cramp is a kind of severe and painful muscle contraction (spasm), which usually occurs suddenly and violently, but the duration is not long, only a few minutes. Muscle pain, hard and tense touch, muscle lump or muscle deformation can be seen by naked eyes. The common muscle is peroneal muscle.

Strenuous activity, repetitive exercise or bad posture can all lead to cramps. Insufficient warm-up before exercise, inactive muscles and bones, and competitive sports are easy to cramp; The cause of cramps caused by activities is that excessive sweating leads to insufficient salt. Drink more boiled water or salt water before exercise to prevent cramps. Only in a few cases, calcium deficiency in the blood can also lead to recurrent or long-term muscle spasms.

Once leg cramps occur, you can immediately grasp the big toe on the cramped side with your hands, then slowly straighten your feet and then stretch your legs hard, so that the calf muscles will not cramp; Or massage the calf with both hands, it can also be effective. The simplest thing is to relax when cramping, and then slowly straighten your feet.

If you often have leg cramps, you need to see a doctor.