Finger numbness refers to numbness of the fingers. Possible causes of finger numbness after tendon sheath cyst surgery include the effect of anesthesia, poor blood circulation, nerve damage and so on. 1. Anesthesia: because tendon sheath cysts need to be carried out under anesthesia, the effect of anesthesia has not completely disappeared for a period of time after the operation, numbness of the fingers will occur, and can be relieved on its own. 2. Poor blood circulation: due to local edema after surgery, blood vessels are compressed, causing insufficient blood supply to the tissues, numbness of the fingers can occur, and can be relieved after activities. 3. Nerve damage: larger tendon sheath cysts can compress the nerves and cause numbness. Although the compression of the nerve root is lifted after the surgery, the nerve damage will not be recovered right away, and it takes a certain amount of time to recover, or the nerves are pulled during the surgery to cause slight damage, which can also lead to the symptom of numbness. There are many reasons for numbness in the fingers after tendon sheath cyst surgery, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in a timely manner to clarify the cause of the disease and carry out targeted treatment.