There are many causes of cramps in the outer calf, and the treatment needs to be decided according to the specific cause. i. Excessive cold causes strong muscle contraction spasms, which can cause cramps in the calf. In this case, you should pay attention to the cold to keep warm, stay indoors, and cover the back of the foot well at night while sleeping. Second, calcium deficiency, especially in elderly female patients, is more likely to cause calcium deficiency due to the decline of estrogen and osteoporosis. In this case, you should eat more food with high calcium content in daily life, such as milk, lean meat, eggs, shrimp, etc. You can take calcium gluconate orally as well as calcium tablets to relieve the symptoms, and in urgent cases, you can also push calcium gluconate injection intravenously. Third, other conditions. For example, fatigue, too much exercise, too much sweating, and too much rest can also cause muscle spasms, causing cramps in the calves. In this case, you should first pay attention to rest, avoid excessive sweating, and timely hydration. The accumulation of lactic acid caused by too much rest can be relieved by appropriate exercise. Fourth, for the elderly, if combined with hypertension, hyperlipidemia, hyperglycemia, and lower extremity atherosclerosis patients, should also consider the lower extremity occlusive atherosclerosis. In this case, first of all, we should pay attention to rest, avoid smoking, pay attention to warmth, actively control blood pressure, blood sugar and blood lipids, and if necessary, consider giving antispasmodic and vasodilator drugs.