The inner thigh tendon is called the adductor group, which includes the short adductor group as well as the long adductor group. The short adductor group includes the pubococcygeus, long adductor, and short adductor muscles. The long adductor group includes the thin femoral muscle and the large adductor muscle. The role of these muscle groups is to maintain the stability of the lower limbs bilaterally during standing and walking. When there is excessive internal retraction and excessive lateral pulling, it may lead to strain or strain of the internal muscles. This will lead to localized bruising and swelling and inflammatory edema, which will stimulate the peripheral nerves and cause pain in the adductor muscle, especially after cold and strain.