There are many causes of muscle soreness, mainly consider the following aspects: first, consider poor local circulation, local ischemia and hypoxia, resulting in increased lactic acid secretion, which is the main cause of soreness. Secondly, it is overexertion, which leads to local muscle damage and can also cause soreness and discomfort. When the vein embolism, it can also cause local soreness and discomfort. There is also a nerve problem, when the lumbar disc herniation, compression of the sciatic nerve can cause sciatica can also be manifested as lower limb soreness and discomfort. There are many causes of muscle aches and pains, each with slightly different clinical manifestations, and relevant examinations should be performed according to the different clinical manifestations. Only after the diagnosis is clear and the treatment is directed at the cause will there be significant results.