When a calf cramp occurs, it is important to stop the activity immediately, rest in place, stretch or massage the local muscles, and generally the symptoms can be relieved as soon as possible. Leg cramps can occur while swimming, on the playing field, walking, productive labor, and some occur at night while sleeping. In swimming leg cramps, should immediately stop swimming, and by people to help help to the pool or the river bank, lying down or sitting, by myself or other people with the hand hand pinch or rubbing massage leg muscles, a few minutes after the cramps can stop. Sports and production labor leg cramps, should immediately stop the activity, sit on the ground, rub and massage the leg muscles, cramps will soon be able to get better. When leg cramps occur at night, you can quickly sit up and use the same methods mentioned above to get better results. The causes of leg cramps are numerous, may be due to cold and damp, strenuous and uncoordinated activities or incorrect posture, part of the varicose veins of the lower extremities of the patient also due to the lower extremity blood reflux obstacles and the occurrence of leg cramps, a number of systemic diseases, as well as low calcium and other conditions can also cause leg cramps. Some systemic diseases as well as low calcium can also cause leg cramps. Therefore, people with recurrent leg cramps should go to the hospital to find out whether they have varicose veins of the lower limbs, low calcium or other diseases.