Otitis externa can drop levofloxacin ear drops to fight infection, hydrogen peroxide solution to rinse the external ear canal, etc., should follow the doctor’s instructions for medication. 1. Levofloxacin ear drops: otitis externa is mostly caused by bacterial infection, the use of this product has antibacterial effect, can treat otitis media and otitis externa caused by sensitive bacteria. Adverse reactions include middle ear pain and itching sensation. It is forbidden for those who are allergic to fluoroquinolones. 2. Hydrogen peroxide solution: otitis externa will produce secretion, the use of this product rinse the external auditory canal, bacteria can be oxidized to play an antibacterial effect, conducive to the removal of pus, necrotic tissue and other secretions. It is suitable for purulent otitis externa, otitis media and so on. Adverse reactions and contraindications to this product are not clear. The presence of otitis externa, should follow the doctor’s instructions to standardize the use of drugs, so as not to aggravate the condition.