Three-year-old Qiang is a lively little boy who really likes to play in the yard. Here he has built a good castle, there is his paradise, and the corner of the small wooden sticks, that is his precious weapon. Sometimes, he squats on the ground to watch the ants move, he can not move for half an hour. This winter just arrived, for some reason, he always shouted itchy. From time to time, he scratches his ears with his little hands and picks his feet. A careful mother also found that his ears were red and swollen. The hotter it gets, the more Xiao Qiang says it tickles. The night before going to bed is especially serious, the mother kept helping Xiao Qiang scratch rub, but also sleep poorly, for several days down, the mother looked haggard. And Xiao Qiang’s foot was scratched by himself, straight water, the surface of the honey-like yellow scab. The yellow scab is still spreading, and the skin around it is starting to get a little red and swollen. The mother was anxious and took the child to the hospital. The doctor told her that it was a combination of frostbite and infection. She was prescribed some oral and topical medication, and was told that her child’s shoes were too small and thin, and that she should buy her child new cotton shoes and pay attention to heat preservation, as well as pay attention to her child’s nutritional status, eat a balanced diet, and exercise. Do not stay still outdoors for a long time. So, what is frostbite all about? What kind of treatment and attention is needed? Frostbite is a limited inflammatory damage to the skin caused by cold and is prone to recurrence. Children with high water content and thin skin are more prone to frostbite. Cold is the main cause of frostbite, which can be aggravated by humidity, cold wind, malnutrition, anemia, tight shoes and socks, and lack of exercise. The early winter (October-November) and early spring (March-April) seasons are the most frequent seasons for frostbite. Children often have cold, purplish skin at the end of the circulation, such as the hands and feet, ears, nose, and buttocks, which then appears as purplish-red edematous patches with unclear boundaries and bright red edges. Self-perceived itching, aggravated by heat. There is a local sensation of coldness and numbness. As the disease progresses, blistering, erosion or ulceration may occur on the surface of the damage, with secondary infection. In severe cases, pigmentation or scarring may remain after recovery. Frostbite is transformed into frostbite when the extent of frostbite involves the entire skin and subcutaneous tissue or even musculoskeletal. The mechanism of frostbite is mainly due to prolonged cold causing vasoconstriction and tissue hypoxic cell damage. After prolonged cold, arteries continue to spasm, vascular contraction is lost and then venous stasis occurs, capillaries dilate, permeability increases, plasma exudes, and local frostbite forms. In severe cases, diffuse thrombosis occurs, which can lead to tissue necrosis. Once frostbite has occurred, there is often a recurrence in the following year when the cold season arrives and in the early spring when the temperature resumes. It is usually treated promptly when symptoms are present, and usually requires good insulation, and is no longer prone to recurrence after 2-3 years. Frostbite that has already occurred should, in addition to whole-body insulation, be careful not to overtighten shoes and socks; the affected area should wear gloves, thick shoes and socks, and ear protection or eye protection if necessary. The area should be gradually warmed up with a warm water bag, or boiled water with onion root or a decoction of Gui and Phyllanthus (20g each of Gui Zhi, Safflower, Phyllanthus, Thornbush and Perilla) to wash the bubble and massage. Avoid re-stimulation by cold. Oral medications can be chosen to comply with vitamin B, especially vitamin B3 (nicotinamide), salvia, and if necessary, low molecular dextran, hexaconitine, and scopolamine can be administered intravenously to improve circulation. Antibiotics can be applied systematically in case of serious infections. Some herbal medicines such as Danggui Sihui Tang and Gui Zhi Hong Hua Tang can improve the vascular function and promote the recovery of skin lesions by activating blood circulation and removing blood stasis and warming and dispersing cold. Local topical medications can be used topically to promote the recovery of local circulation without ulceration of the lesions, such as mucopolysaccharide ointment with polysulfonic acid, capsaicin ointment and vitamin E ointment. If the lesion has already broken down, local application of mupirocin ointment or compound polymyxin B ointment can be used to prevent and control infection. Topical infrared and helium-neon laser irradiation can help restore local circulation and prevent infection. To avoid frostbite, parents should pay attention to giving their children a balanced and nutritious diet from infancy and childhood, and pay attention to physical exercise so that children can gradually adapt to the low-temperature environment. Pay attention to the insulation of the ears, hands and feet, hips and other peripheral parts during outdoor activities, soak the feet in warm water before bedtime every day, and have the mother and father give the child a proper massage before bedtime so that the child can spend a healthy childhood and have a strong body.