The soreness of the inner thigh is mainly due to two reasons: 1. Due to the excessive tension in the position of the inner thigh muscle for a longer period of time, resulting in the formation of local strain, which will lead to more local inflammatory metabolites, metabolites will stimulate the peripheral circulation, resulting in a decrease in local arterial blood supply, so there will be a relative decrease in local energy nutrients electrolytes, and the appearance of soreness symptoms. In addition, the decrease in venous return leads to an increase in the accumulation of metabolites, especially lactic acid, which stimulates the peripheral nerves and aggravates the acidity. In addition, because the hip joint is in the abduction state for too long, the internal muscles are continuously stretched, which will also lead to vasoconstriction, thus affecting the blood supply and aggravating the symptoms of soreness. 2, due to abnormalities of the foramen ovale nerve, such as some peripheral hyperplasia and inflammatory stimulation, it may stimulate the foramen ovale nerve, resulting in obvious symptoms of soreness in the medial muscle tissue.