The causes of leg pain are mainly physiological and pathological. If long-term standing workers and sudden strenuous exercise, there will be muscle pain in the legs, mainly due to muscle metabolism produces excessive lactic acid and potassium ions caused by excessive muscle pain, this is a physiological phenomenon, do not need to be overly concerned about, usually rest for a few days, the symptom will be relieved, and usually pay more attention to the rest can reduce the occurrence of such a symptom. At the same time, leg pain may also be a symptom of certain clinical diseases, common diseases including trauma, lumbar disc herniation, spinal tuberculosis, hip arthritis, rheumatic polymyalgia, necrosis of the femoral head, and other diseases can also lead to muscle pain in the leg. If the recurrence of leg muscle pain, rest does not have obvious relief, then you need to go to the regular hospital in time to find out the cause of the disease, active treatment.