Asymptomatic tendon sheath cysts in babies can be left untreated. When symptoms appear, they can be treated with medication and surgery. 1. Medication: Glucocorticoid drugs, such as prednisone, can play an anti-inflammatory role and reduce the exudation of inflammatory substances. Non-steroidal anti-inflammatory drugs such as aspirin and diclofenac can reduce inflammation and relieve pain. The above drugs are recommended to be used under the guidance of a doctor. 2. Surgery: Surgery can completely remove the cyst and relieve the patient’s symptoms. It is suitable for patients with recurrent pain and pressure symptoms caused by recurrent episodes of ineffective conservative treatment. 3. Others: Joint braking can reduce joint activities and avoid further aggravation of the injury. Asymptomatic tendon sheath cysts in children can be left untreated. If the diagnosis of tendon sheath cyst is confirmed, it is recommended to go to the hospital for timely treatment.