After a scalding injury with boiling water that causes swelling, it is essential to first soak the affected area in running tap water or cold water for at least half an hour to reduce the skin temperature. If the burn is severe, not only showing swelling but also skin rupture, one should apply some ointment and then wrap it with gauze to keep the dressing clean and prevent infection, which can promote healing of the wound surface and reduce swelling more quickly. After a scald, the permeability of capillaries in the tissues notably increases, causing fluid from the vessels to seep into the interstitial space or outside the body, leading to tissue edema. It is beneficial to elevate the affected limb to increase the blood flow returning to the circulation, thereby alleviating the severity of the swelling. If the burn is severe enough to require surgery, skin grafting or flap surgery might be necessary.