The patient’s thighs are sore and painful, which can be seen in the following conditions: a. Pear-shaped muscle syndrome: mainly due to the sciatic nerve being compressed by the pear-shaped muscle, which can cause soreness and pain in the buttocks at the back of the thighs, and sometimes can radiate to the calves. Second, lumbar disc protrusion: protruding disc tissue compresses the spinal nerve root, which can cause sciatic pain, mainly radiating from the hip to the back of the thigh, then to the calf, all the way to the foot with numbness. Third, local lactic acid accumulation: patients may be a large number of sports in a short period of time, or too much physical labor, can cause a large number of lactic acid accumulation in the thigh muscles, will be manifested as the thighs of soreness, pain, nighttime soreness will be particularly obvious.