Swelling with closed injection may be related to tissue damage, local inflammation, etc. The main treatment methods include local hot compresses, anti-infection treatment. 1. Tissue damage: when playing closed injection, if the damage to the local tissue may appear tissue fluid exudation, resulting in local swelling, this situation can be warm water line local hot compresses, promote blood circulation, generally will be relieved. 2. Local inflammation: local swelling after the closed injection, may also be due to pathogenic bacteria infection caused by inflammation, generally appear local redness, swelling, pain, etc., at this time the need for anti-infection treatment. In addition, after the closed injection should pay attention to rest, avoid local stimulation, especially the injection site can not get wet, in order to avoid infection. Swelling, if it is difficult to relieve, should be under the guidance of the doctor, to clarify the cause and standardized treatment.