There are two main reasons for hip joint soreness: First, excessive hip joint activity leads to excessive fatigue of local muscles and surrounding soft tissues, resulting in strain injury, which gradually increases lactic acid and metabolic products. After the peripheral nerves are stimulated, the feeling of soreness will easily appear. In addition, due to the gradual accumulation of metabolic products, the peripheral nerves will be stimulated and such a situation will occur. Second, because the hip joint itself has some aseptic inflammatory lesions, such as the hip joint has been traumatized or had repeated pain formed a chronic aseptic inflammatory lesions. When the hip joint is cold, tired or sleeping at night, the hip joint muscles are not fully relaxed, leading to more and more inflammation of the hip joint lesions, resulting in an increase in lactic acid and other metabolic products, which will stimulate the peripheral nerves and cause soreness and swelling.