Whether the pus drainage needs to be changed daily is analyzed according to different factors such as the amount of drainage and local wound healing. First, if the degree of infection in the abscess cell is heavy, there are still more necrotic tissues and purulent secretions, local drainage can be accompanied by more pus drainage out daily, and the local dressing is often in the state of oozing wetness. At this time, the wound dressing needs to be changed daily to keep the drainage of pus in the pus cavity smooth, and also to avoid the formation of eczema by over-stimulation of the skin around the wound by pus, so that the wound is in a relatively dry state, which is more conducive to the early recovery of the wound. Second, if the amount of pus in the patient’s abscess is less, and the patient’s wound dressing is drier, and the abscess cavity is accompanied by a large amount of new granulation tissue, the drainage of the abscess does not require daily dressing changes, and 2-3 days to change the dressing once.