Odor in the ear may be related to otitis externa, cholesteatoma of the external auditory canal, and chronic suppurative otitis media, which are mainly treated by medication and surgery. 1. Otitis externa: Typical symptoms are earache, ear canal secretion, and purulent smelly secretion from the external ear canal. Common therapeutic drugs include levofloxacin hydrochloride ear drops, hydrocortisone ear drops, ibuprofen extended-release capsules, etc., which are used for anti-infection, anti-inflammatory and antipyretic and analgesic treatments respectively, and systemic application of antibiotics, such as amoxicillin and cefuroxime, etc., in severe cases. 2. Cholesteatoma of the external auditory canal: it is caused by the blockage of the bone of the external auditory canal by the epithelial mass containing cholesterol crystals, and it is usually unilateral. It is usually unilateral and is followed by earache and foul-smelling discharge from the external auditory canal. Treatment generally requires complete removal of the cholesteatoma, which can be removed under otoscopy or after anesthesia. 3. Chronic suppurative otitis media: refers to a chronic inflammatory disease of the tympanic chamber, sinus and eustachian tube caused by various factors. Typical symptoms are tinnitus, hearing loss and recurrent pus in the ear canal. Common treatment after cleaning the external ear canal secretion, ofloxacin ear drops and other points in the ear, tympanic membrane perforation or medication is not effective in the feasibility of tympanoplasty. If you find the odor in the ear, you should consult the hospital in time, after the diagnosis is clear, follow the doctor’s instructions for medication and treatment.