Tendon sheath cysts on the bottom of the foot are often subjected to friction and pressure due to their specific location, so once they are diagnosed, it is still advocated to treat them actively. There are generally three methods of treatment: the first method is to squeeze it by hand, but the recurrence rate is relatively high because although the cyst is squeezed and the cyst fluid is evacuated to the surrounding tissues, the cyst wall is not removed, so the recurrence rate is relatively high. The second method, local puncture, after puncture, inject hormones, such as Depo-Provera, prednisolone, etc., usually every 5-7 days, 2-3 times in a row. After each injection, pressure bandage is needed. Some patients can be cured by this method, but it is also a treatment method with relatively high recurrence rate. The third method, with the lowest recurrence rate and the most complete treatment, is surgery.