1, clean the skin before using the drug, dip a cotton swab in the drug and dot the rash, 3-5 times a day, as little as possible contact with normal skin, no need to wash after coating. 2, 3 days before the use of the drug, a small trial in the lesions, 3 days if discomfort, such as local skin redness, swelling, heat, pain, itching and other symptoms should be immediately discontinued, while the skin can be cleaned with cold boiled water wet compress, 3 to 5 times a day, 15 to 30 minutes each time, if necessary, to the hospital to seek medical advice from a dermatologist. 3, after three days if there are no uncomfortable symptoms, gradually expand the area of topical application. 4.Place the solution in a dark place, if discolored or deteriorated, stop using.