Closure therapy for finger pain is commonly used in the treatment of stenosing tenosynovitis, which is usually treated by injecting medication into the tendon sheath using a syringe. Stenosing tenosynovitis is a sterile inflammation of the tendon sheath due to over-activity of the fingers, etc. The common symptoms are finger popping with pain and limited movement. The procedure of drug closure treatment is to extract the appropriate amount of drugs, commonly used are lidocaine, tretinoin, etc., select the appropriate puncture point, disinfect the puncture point, and then inject the drugs around the tendon sheath, and then pull out the needle and press to stop bleeding. The operation of drug closure therapy is very professional, and it is necessary to exclude relevant contraindications and judge whether there are indications before the operation, and there may be adverse reactions such as hypoglycemia and drug allergy during the operation, so it is recommended to consult the doctor in time for the relevant operation by the doctor.