Skin redness may be caused by capillary expansion and congestion, patients should relax and pay attention to keep warm. It may also be caused by contact dermatitis, eczema and other diseases, patients can take medication. 1. Capillary expansion and congestion: patients in nervous or emotional excitement, sympathetic nerves will be disturbed phenomenon, resulting in capillary expansion and congestion, the patient will appear the phenomenon of skin redness, may also be cold air stimulation. It is recommended that patients adjust their mood, avoid tension, and pay attention to the skin to keep warm. 2. Contact dermatitis: for contact dermatitis caused by redness of the skin, the patient can follow the doctor’s instructions to take chlorpheniramine maleate tablets, Benadryl tablets and other antihistamines. In addition, patients can also follow the doctor’s instructions to use sodium chloride injection, boric acid solution and other external cleansing agent to clean the skin. 3. Eczema: Eczema can also lead to symptoms of redness of the skin, patients can follow the doctor’s instructions to use isacridine solution, boric acid solution and other topical lotions for wet compresses, but also oral tacrolimus ointment, pimecrolimus cream, such as calcium-modulated phosphatase inhibitor ointment. In addition, patients can also follow the doctor’s prescription oral loratadine tablets, chlorpheniramine maleate tablets and other antihistamines. When the patient has the symptom of skin redness, it may be the normal physiological phenomenon of capillary expansion and congestion, and does not need special treatment. If it is caused by a disease, patients should consult a doctor in time and follow the doctor’s instructions for treatment.