Finger trauma injury to the tendons after surgery half a month after removing the stitches some swelling on the back of the hand, considering the possibility of postoperative normal physiological swelling, or infection, the former generally pay attention to swelling can be, the latter need to be given anti-infective drug treatment. Trauma can lead to local capillary damage in the fingers, causing tissue fluid exudation, and surgery has caused secondary damage to the local soft tissues, local blood circulation deteriorates, and the elimination of swelling slows down. Patients can improve local blood circulation by elevating the affected limbs, applying hot compresses on the back of the hand, physical therapy (baking electricity), applying anti-swelling medication (mannitol), local massage and proper fist-clenching exercise to lighten the local edema. If postoperative infection occurs, it may cause redness and swelling on the back of the hand, in which case anti-infective drugs (benzathine, vancomycin, etc.) should be used, and the blood routine should be rechecked at regular intervals until the white blood cells return to normal. Postoperative swelling of the back of the hand, it is recommended to actively consult a physician under the guidance of treatment.