Swelling and immobilization of the finger after hitting the closure is generally a normal reaction, which is caused by the irritation of the drug, which elevates the local pressure. Closed injection is a kind of closed therapy, mainly injecting drugs into the pain points, joint capsules, nerve trunks, etc., with anti-inflammatory and pain relief, spasm relief, etc., the drugs are injected directly into the localization of the lesions to achieve the best therapeutic effect. Usually after the closed injection, there will be different degrees of localized swelling, pain intensification, usually 2 to 3 days will be self-swelling. After the closed injection usually pay attention to the diet, do not eat spicy and stimulating food in the short term, and do not scratch the injection site. If there is obvious swelling, pain and other symptoms. This situation needs to go to a regular hospital for treatment, and it is not recommended to solve it by yourself.