The symptoms of tendon sheath cysts are mainly as follows: first, because a tendon sheath cyst is a localized swelling bulge, it will be found on the surface of the body, are sub-circular or sub-semi-circular, and when touched with the hand, it will feel hard in texture and will have mild pressure pain, because there is no obvious mobility and it is covered with a periosteum, which will affect the flexion and extension function in daily life. Tendon sheath cysts are mostly found in the dorsum of the foot and the dorsum of the hand, which can have a significant effect on wearing shoes in daily life, and in the dorsum of the hand, which can cause pain in the wrist joint during wrist flexion and extension. Therefore, tendon sheath cysts need to be treated surgically to have them removed.