Leg and hand cramps are a kind of spontaneous tonic contraction of muscles, which is called muscle spasm in medicine, and the common causes are localized pressure, cold and calcium deficiency, and the treatments are physical therapy and medication. 1. Localized pressure: local neurovascular pressure stimulates the muscles to spasm, generally by changing the position of the local pressure can be relieved, which is a normal physiological phenomenon. 2. Cold: After the legs and hands are cooled at night, the blood circulation of the muscles will be slowed down, which can stimulate the muscle spasm, and can be relieved by giving local massage, hot compresses and other physical treatments. 3. Calcium deficiency: when the body lacks calcium, it may lead to muscle dysfunction, and the appearance of hand and foot cramps, can be given to supplemental calcium tablets, more calcium-containing foods, such as milk, shrimp, etc., and more sun exposure, increase the amount of exercise, in order to increase the absorption of calcium. If the leg and hand cramps continue to be unrelieved or aggravated, you should go to the regular hospital in time to find out the cause and give proper treatment and therapy.