Hot water bags, baby warmers, moxibustion, are our old friends in winter, but they are also killers in our sleep. Often inattentive, in the process of use because of sleep, causing “low temperature” burns, academically called hypothermic burns. The more common case is: a sleep awake, found a small blister in the affected area, many people do not care. After a few days, the redness and inflammation began, only to realize the seriousness of the problem. Some friends have even forgotten to use the hot water bag, they do not know what the cause of the wound. The cause of the injury is described graphically as “slow cooking” or “warm water boiling frog”. Although the “Three Musketeers” temperature is not high, but due to prolonged contact with the skin, the local heat slowly accumulate, and finally will cause serious burns. Here are the common temperature of various heating devices: baby warmer 50 ℃ -60 ℃ (can be a long time continuous heating), electric heating fan > 100 ℃ (the surface temperature of the electric heating fan), electric heater 25 ℃ -85 ℃ (brand, gear different), hot water bag 80 ℃ (when adding boiling water), electric blanket 20 ℃ -45 ℃ (brand, gear different). 60 ℃ contact for more than 5 minutes will burn the skin, and we Sleeping contact time, generally longer, so the trauma caused by low heat burns are generally deep II degrees to III degrees, that is, more serious than hot oil burns. Due to the necrosis of nerve endings after deep burns, the pain sensation disappears, and the early local symptoms are not obvious, so they are often neglected by patients and miss the time to intervene, resulting in delayed healing and severe scarring. This is especially important for diabetic patients. Diabetic patients have poor peripheral circulation, and their pain sensation is more sluggish than the general population, but the degree of infection after injury is much more severe. You can see that after the blister ruptures, the healing process is not what we would expect – first crusting, then scabbing off, and finally healing. Instead, a white necrotic tissue, or “stewed” flesh, appears in the center. The surrounding area appears red and swollen. The wound heals slowly from the periphery to the center. This is a typical healing pattern for deep wounds, where infection is almost inevitable. The depth of this type of wound varies, depending on the length of time spent sleeping, and heavier “low temperature” burns generally take 2-3 months to heal and leave significant scarring after healing. In the treatment process, the following points need to be noted: 1, early as possible to reduce the number of times and time to walk on the ground, the affected limb elevated to reduce congestion. 2, regular wound dressing changes, the recommended use of silver sulfadiazine cream plus gel-type drugs, external gauze or other dressings, not above the drug after the exposure of the wound to the air. 3.The infection process is inevitable, and the degree of infection can be reduced by the correct use of drugs. 4.After the necrotic tissues fall off, growth factors can be used to promote healing. 5.After the course of the disease exceeds 2 weeks, bathing is recommended. The wound is not afraid of soaking and rinsing, and it is important not to leave the water untouched for a long time; bathing does not increase the risk of infection. 6.After healing, you must receive anti-scar treatment to prevent scar proliferation. 7. If the aesthetic requirements are high, early surgery is recommended to shorten the course of the disease and reduce scar formation. It is important to note that young women are prone to cracking after suturing due to tighter skin, so surgery should be chosen carefully.