Whether dressing change is accompanied by pain after wound incision and drainage is objectively analyzed on the basis of factors such as the severity of the patient’s wound infection, the depth of the location of the drainage strip, and the patient’s tolerance of pain. If the patient’s local infection is mild, the location of the drainage strip is superficial, and the patient’s pain tolerance is strong. At this time, when the wound dressing change, the patient’s pain symptoms are very light, and most patients can completely tolerate. Second, if the patient’s local wound infection is more serious, the pus cavity with more purulent secretions, the location of the drainage strip is deeper, and the patient’s tolerance of pain is poor. When changing the wound dressing, the patient will often be accompanied by obvious pain symptoms, can be given in advance to the patient 100mg tramadol injection, so as to reduce the wound pain symptoms. Try to make the patient cooperate with the wound dressing change, in order to promote faster wound healing.