Many cosmetic surgery procedures require cold or hot compresses afterwards, which can help to reduce swelling quickly and facilitate recovery. However, many people do not know under what circumstances cold or hot compresses are needed. In order to avoid mistakes and to allow the wound to recover as soon as possible, cold or hot compresses need to be applied in order of priority. In general, cold or hot compresses are suitable for post-operative recovery of almost all wounds as long as they do not wet the wounds and cause infection and other problems. Cold compress – 3 days after surgery Effect: 2 days after surgery is the time when the wound blood vessels are prone to bleeding, at this time, ice compress can make the surgical site vascular contraction in the cold, reduce bleeding, favorable recovery. Cold compresses are commonly used in the following two ways: 1, ice bag compress method: This is a dry cold compress method, especially effective in the conditions of ice, in the rubber made of ice bag, filled with half a bag of crushed ice (or cold water), the bag flat on the table, so that the mouth of the bag raised, with the hand lightly press the bag body, discharge the gas in the bag, and then tighten the bag, dry the surface of the water, set on the cloth cover, placed on the affected part can be. Cold compress time is generally 20-30 minutes, can be multiple times a day. 2.Wet cold compress: use a basin with cold water, soak two small towels or gauze in the basin, take out and wring to half dry and then put on the affected part. 4-5 minutes to change the dressing cloth, 20-30 minutes each time, multiple times a day. Note: After surgery or within 2 days after the injury, not hot compresses! But cold compresses! This point many people just get it backwards! Ice bag broken water, you can no longer use, and the need to promptly change the wound dressing to avoid infection. Hot compress – 4 days after surgery Effect: Hot compress can make the body surface temperature rise, subcutaneous tissue stretching, spasm of capillary relaxation, expansion, blood flow accelerated, metabolism flourished, promote the lesion site tissue blood, siltation, muscle, anti-inflammatory, swelling, pain and scar tissue softening. Hot compresses are commonly used in the following two methods: 1, hot water bag method: belongs to a dry heat compress method. First check the hot water bag has no gas leakage, and then the hot water (preferably 60 ℃ -70 ℃) to two-thirds of the bag capacity, discharge the gas, tighten the mouth of the bag, dry the water outside the bag, packed into a cloth sleeve or wrapped in cloth to be used. In general, each hot compress 20-30 minutes, 3-4 times a day. If there is no hot water bag, you can also use a warming pot (wrapped in a towel) hot compress, can also be used to fry hot salt or rice into the cloth bag instead. 2, wet heat compress method: dressing cloth available gauze or towel made. First, the dressing cloth dipped in a basin of hot water, remove and wring to half dry, with their own wrist palm side test whether the temperature is appropriate (must not be hot to dress the affected part), dressing cloth and then covered with cotton pads to avoid heat dissipation, about every 5 minutes to change 1 dressing cloth. The dressing cloth should be prepared in two pieces and the skin color should be observed when changing. Each time 15-20 minutes, 3-4 times a day. Caution: Take care that the towel and hot water bag must not be too hot to avoid burns. For the wound has nerve damage, local numbness of the candidates should be more careful. Pay attention to keep the wound dressing dry, once inadvertently wet, need to change the wound dressing in time to avoid infection.