Pus in the external auditory canal is often seen in otitis externa, otitis media, mostly caused by bacterial infection, in addition to pus in the external auditory canal can also cause pain, ear stuffiness and hearing loss. Clinical treatment starts with 3% hydrogen peroxide to clean up the pus in the external ear canal, and several times until there is no foam. Then use levofloxacin ear drops to drop the ear, most need to add antibiotic treatment, oral cefprozil. If the swelling in the external auditory canal is obvious and oozing is more, hormones such as dexamethasone and oral hormone prednisone can be added to the ear drops, which can significantly reduce the swelling and oozing. The treatment course is usually 5 days, during the treatment period, should not dig the ear, keep the external ear canal clean, eat less sweet and sour food. Regular checkups should be conducted to observe the morphology of the external auditory canal and tympanic membrane. If perforation of the tympanic membrane occurs, surgical treatment may be considered.