Frostbite is a cold-induced, limited inflammatory skin damage that 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 the re-stimulation of cold. Some herbs that invigorate blood circulation, remove blood stasis, warm the blood and disperse cold such as Angelica Sinensis Sikyong Tang and the experimental formula Gui Zhi Hong Hua Tang are useful for improving vascular function to promote recovery of skin lesions. 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 lesions have already broken down, topical mupirocin ointment or compound polymyxin B ointment can be applied to prevent and control infection. Local infrared light and helium-neon laser irradiation are helpful for restoring local circulation and preventing infection.