The aggravation of pain after closed injection for tendinitis is related to anesthesia waning, nerve damage, and improper injection site, and can be treated with observation, anti-inflammatory pain medication, and ice packs according to the condition. The closed injection of tendovaginitis is generally composed of anesthetic drugs and hormones, and the aggravation of pain after closed injection is generally related to the following factors: 1. Anesthesia subsides: the closed needle itself is invasive, the pain is obvious after anesthesia, such as not serious can not be treated, continue to observe can be. 2. Nerve damage: severe pain after playing may be the needle stimulation of the nerve, nerve damage caused by, can follow the doctor’s advice to use diclofenac, loxoprofen sodium, celecoxib and other non-steroidal anti-inflammatory pain medication, symptoms can be gradually relieved. 3. Improper injection site: the normal tissue damage caused by pain aggravation, should be localized braking and give ice packs to reduce pain symptoms. Tenosynovitis pain aggravated by closed injection may also be caused by other reasons, it is recommended to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment. Do not self-medicate.