A tendon sheath cyst is a swelling, a benign mass containing jelly-like mucus that occurs near the joint capsule or tendon sheath, which is either unicompartmental or multicompartmental (and can be easily missed during surgical removal). Tendon sheath cysts are not cancerous and do not spread, although they may enlarge in size, they then do not spread to other parts of the body. Clinically, they are most often found in the hand, wrist and N fossa (knee fossa). Symptoms of tendon sheath cysts in the wrist are obvious; there is a slight soreness at the site of development, and when the cystic fluid becomes more fluid it becomes hard and painful to press. If the affected area is at the wrist, it will also be accompanied by wrist weakness, discomfort or soreness, radiating pain, and in severe cases of nerve compression, it will also cause numbness and certain dysfunction of the limbs. N fossa cysts are generally larger, symptoms are not obvious, but because of the growth of the joint capsule, in the surgical resection of the separation of the deeper, and even into the joint cavity, so the resection is difficult, the recurrence rate is relatively high. Treatment: 1, small tendon sheath cysts, direct pressure and kneading flat, there is a possibility of cure, but the probability of recurrence is very high. 2, surgical resection, currently the most common method used by Western medicine. The recurrence rate after surgical excision depends on the cyst site, the type of growth at the base site. The whole treatment cost is not high, and the risk is much lower than other surgeries. At present, many hospitals have outpatient clinics, but due to the current medical environment, in order to timely respond to the condition of a very small number of patients with unexpected situations (such as local anesthetic allergy, anesthesia accidents, hemorrhage, etc.), more hospitalization.