Symptoms of leg pain caused by potassium deficiency in the body can be relieved by potassium supplementation, dietary treatment and nerve nutrition; at the same time, find out the cause of potassium deficiency and actively treat the primary disease. 1. Potassium supplementation: According to the results of laboratory tests, appropriate potassium supplementation treatment can be used to correct the potassium deficiency by oral or intravenous drip to alleviate the symptoms of leg pain, and attention should be paid to the monitoring of urine output. The electrolytes should be rechecked regularly to observe the effect of potassium supplementation. 2. Dietary treatment: usually strengthen nutrition, eat more potassium-rich food, such as banana, orange, orange juice, apple, kelp and so on. 3. Nutritional nerve and blood vessels: medicines such as methylcobalamin can be used to nourish the nerves and blood vessels in the legs and improve the symptoms of leg pain. 4. Find out the cause: the causes of potassium deficiency include diarrhea, vomiting, chronic gastritis, etc. Further examination should be carried out to find out the cause of potassium deficiency and actively treat the primary disease. Specific treatment should be carried out under the guidance of doctors.