Commonly known as leg cramp, medically known as leg pain spasm, it is characterized by sudden, severe and involuntary contraction of one or more groups of muscles in the leg. Although the spasm lasts only a few minutes, muscle discomfort or tenderness will last for several hours after the attack. Clinically, calf gastrocnemius cramps are very common in the elderly, and they often occur when sleeping at night. Incomplete leg cramps are night leg cramps caused by calcium deficiency, most of which are idiopathic. However, when suffering from certain diseases, the probability of leg cramps increases, which is called secondary leg cramps, such as various myopathy, peripheral neuropathy, uremia, diabetes, thyroid diseases, low magnesium, low calcium and low potassium. Of course, most patients are related to calcium deficiency. Such as postmenopausal women, dieters, etc. Leg cramps due to insufficient calcium absorption or intake. In addition, taking some drugs can also induce secondary leg cramps. These drugs include hormones, morphine for relieving pain, cimetidine for treating stomach diseases, diuretics for lowering blood pressure, nifedipine, statins for lowering cholesterol, lithium salts of psychotropic drugs, etc. Most people think that leg cramps are caused by calcium deficiency in the body, but this is not entirely the case. Because a considerable number of elderly people will cramp after calcium supplementation. It should be emphasized that idiopathic leg cramp at night is a benign process, so it is also called benign spasm. So, if you have leg cramps, don't worry too much. However, it should not be ignored. It may be caused by illness or adverse reactions of drugs. You should see a doctor and cooperate with the doctor to do appropriate auxiliary examinations to determine whether you have the above-mentioned diseases that can cause cramps, whether you are taking drugs that can cause leg cramps, and whether you have insufficient calcium intake. Pay attention to people who often have leg cramps in daily life. In daily life, they should pay attention to the following aspects: avoid drinking, coffee, cola and other drinks that excite the central nervous system before going to bed, don't read books with refreshing effects, and don't watch exciting film and television works. Don't be upset until you are sleepy, and make sure that you fall asleep soon after lying in bed for a while. When patients with leg cramps choose which drugs to take, they can take a step-by-step approach according to the degree of adverse drug reactions affecting their health. If the calcium intake is insufficient, calcium supplementation is given priority, and it is best to take it before going to bed. When calcium supplementation still can't relieve cramp symptoms, try to supplement vitamin E twice a day for 2 weeks. If the symptoms are relieved, change it to 1 time a day. If calcium and vitamin E supplements don't work, try magnesium and potassium supplements. Others try vasodilators such as nafurosemide, anticholinergic muscle relaxants, calcium antagonists and antiepileptic drugs. These drugs should be taken under the guidance of a doctor. There are many methods to treat calf cramps, and they are all very simple and easy. Usually, they relax local muscles to relieve pain.