The drainage process of the abscess cavity is as follows: firstly, prepare all the necessary items for drainage, position the patient appropriately, and choose a good incision for the abscess cavity, usually choose the lowest point of the abscess cavity, so as to facilitate the outflow of pus. Use 2% lidocaine to do local infiltration anesthesia around the incision, after the effect of anesthesia, cut the skin, let all the pus flow out of the abscess cavity after incision, and then use hydrogen peroxide and saline to rinse the abscess cavity repeatedly. When rinsing the pus cavity need to be rinsed to each small cavity in place, to avoid pus residue in the pus cavity, after rinsing the pus cavity in the Vaseline gauze block, bandage can be.