Pain after water in the ear is mostly due to ear canal cerumen soaking and swelling or acute otitis externa or chronic suppurative otitis media, which should be treated by professional doctors to remove ear canal cerumen and apply ear drops or oral medication. 1. Removal of ear canal cerumen: If there is ear canal cerumen in the ear, it will be soaked and swollen when the ear enters water, thus squeezing the inside of the ear canal and causing pain, it should be removed by a professional doctor, and suctioned out by otoscopic suction; and if necessary, it should be further softened by 5% sodium bicarbonate, and then rinsed out by warm physiological saline. 2. Acute otitis externa: it can be caused by water in the ear, resulting in swelling and pain in the ear, aggravated by chewing and talking. Ear drops can be used under the guidance of a doctor, such as levofloxacin hydrochloride ear drops, local ichthyol glycerin gauze, anti-inflammatory and swelling; if necessary, systemic application of antibiotics, such as amoxicillin, cefuroxime, roxithromycin, etc.; severe ear pain oral painkillers, such as ibuprofen. 3. Acute attack of chronic suppurative otitis media: If there is a chronic suppurative tympanic membrane perforation, water in the ear can lead to an acute attack of otitis media inflammation, pain, pus symptoms. Can use 3% hydrogen peroxide cleaning under the guidance of the doctor, antibiotic ear drops point ear, such as levofloxacin hydrochloride ear drops, if necessary, systemic application of antibiotics, such as amoxicillin, cefuroxime, roxithromycin and so on. If you have pain after water in the ear, it is recommended to go to a regular hospital as soon as possible to consult a professional otolaryngologist for examination and take the necessary measures to deal with the problem.