Children can get water when swimming if their ears are not well protected. If the water quality of the swimming pool chosen is not very good, in this case it is easy to stimulate the patient’s ear canal mucosa to become congested and inflamed, leading to the formation of otitis externa or otitis media in children. Therefore, if you want to go swimming, you need to choose a swimming pool with good water quality, protect yourself, wear earplugs, reduce the chance of contact with the water inside the pool, and actively treat the inflammation symptomatically. If otitis media or otitis externa is found, you can use cotton swabs to clean up the secretions in the ears, and then use levofloxacin hydrochloride ear drops for anti-inflammation, and if necessary, take oral roxithromycin granules to prevent systemic infection. You should let your child exercise more to improve their immune system and keep their ears clean.