The treatment of infectious dermatitis is divided into 2 aspects, including control of infection and anti-allergy treatment. 1. control of infection: first of all, it is necessary to check the blood routine to see whether the total number of white blood cells and neutrophil fraction is elevated, if elevated, it is necessary to take oral cephalosporin antibiotics, or roxithromycin, and apply topical fusidic acid ointment. 2. allergy: it is necessary to take oral levocetirizine hydrochloride capsules, orotadine hydrochloride tablets, and apply topical trimethoprim The treatment is carried out with topical trimethoprim and paregoric ointment. For infectious dermatitis with vesicles and oozing, and yellow crusts, topical Levanox solution should be applied twice a day, once for 20 minutes. During the treatment period, you need to avoid alcohol, beef, seafood and other hair products, and avoid spicy, irritating food.