12-year-old children with itchy ears and red moist bottom can be considered related to diffuse otitis externa, fungal disease of the external auditory canal or eczema of the external ear, etc., using topical creams or ointment type rubbing. 1. Diffuse otitis externa: actively apply antibiotics such as penicillin to control the infection, and hydrogen peroxide solution can be used to clean the pus and secretion of the external auditory canal. 2. Fungal disease of the external auditory canal: can be sprayed on the external auditory canal with mycotoxin, and according to the results of fungal culture to choose sensitive antifungal drugs such as fluconazole and other treatments. 3. Eczema of the external ear: can be used externally with glycerine lotion to stop itching, if necessary, can follow the doctor’s instructions to apply dinexed cream and other medications. Children with ear discomfort symptoms, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to standardize the use of medication.