As summer comes and the weather gets hotter, many patients who have just had surgery ask me before they leave, “Doctor, when can I take a shower?” I often explain to these patients that they can’t take a shower for the time being because the skin is not completely healed after the surgery, so they can wipe the surrounding skin first and wait for the stitches to be removed before they can take a shower. The stitch removal time is generally as follows: head, face and neck: 4-5 days; lower abdomen and perineum: 6-7 days; chest, upper abdomen, back and buttocks: 7-9 days. From this small detail we can find that many patients think that they are done with the surgery, but do not know that post-operative wound care is actually also very important. Clean wound after surgery generally does not exist “change” problem, 1-3 days after surgery physician will check the wound to see if there is infection, called dressing change is more appropriate, in the wound dressing for sweat, blood, etc. wet or other contamination also need to change the dressing. Wounds with signs of infection require daily dressing changes depending on the exudate. A sterile incision can become infected due to improper dressing changes; the skin flap can become necrotic due to alcohol irritation; more painful are some necrotic skin wounds that require long dressing changes to heal; and bone outgrowth often requires a skin flap to be fixed. There is a lot to be said for changing the medication, and the right change of medication can often turn decay into magic. Once a wound is not properly treated, it can easily lead to wound infection. Once a wound infection occurs, the wound needs to be treated in a timely manner, otherwise it may lead to long-term wound non-healing and other serious lesions occur. The first thing we should do is to check the wound site and anti-inflammatory work, especially the exudate of the wound site for bacterial culture, according to the results of bacterial culture targeted selection of antibiotic drugs for treatment. If the wound site exudate more, accompanied by more pus, need to come to the hospital in time to review and change the medication. The doctor can use saline to flush the patient’s wound. If the patient’s wound is infected with pus is more serious, you need to do a good job of drainage of the wound to avoid pus accumulation in the wound, affecting the healing speed of the wound. For some wounds with more serious infections, the wound area should be debrided in a timely manner to remove necrotic tissues and sources of infection from the patient’s wound, and if necessary, the drainage should be opened and replaced regularly to avoid the formation of sinus tracts. In short, wound infection must be actively treated, otherwise it will seriously affect the wound healing. After treatment, the wound should be dressed in a timely manner, the treatment process should be aseptic, and the daily diet should be well regulated to control blood sugar, so as to better promote the wound healing.