The redness of the skin does not go away, may be contact dermatitis, frostbite, sunburn and other conditions, need to clarify the cause of the symptomatic treatment, usually including general treatment and drug therapy. 1. Contact dermatitis: allergic or irritant reaction caused by contact with certain sensitizing or irritating substances, should find the causative factors and avoid, while giving symptomatic treatment, such as topical glucocorticoid ointment mometasone furoate cream, oral antihistamine such as loratadine. 2. Frostbite: long-term exposure of the skin to lower temperatures in the environment, resulting in localized minor frostbite of the skin, commonly seen after skiing and skating, outdoor athletes. Usually, it is accompanied by localized burning and itching, and the symptoms are reduced or subsided after rewarming. If necessary, you can use topical vitamin E ointment and frostbite ointment, etc., has been broken lesions can be used antibiotic ointment, such as mupirocin ointment, can also be used helium-neon laser and other physiotherapy. 3. Sunburn: the skin is exposed to ultraviolet radiation, redness or accompanied by symptoms of peeling, should do a good job of sunscreen, to avoid ultraviolet rays again burn the skin. You can use ice to slow down the symptoms, if the symptoms can not subside, you can use glycerine lotion or glucocorticosteroid cream such as hydrocortisone butyrate cream and so on. If the skin stays red, it is recommended to consult a doctor to clarify the cause of the problem and then treat it appropriately. The above medications should be used in accordance with medical advice.