Hydrogen peroxide is mainly used to disinfect and anti-inflammatory, first of all, long-term use will lead to weakening of the resistance of the ear to bacteria, the ear will lose the ability to resist bacteria, but also irritate the ear, so that the tympanic membrane in the ear is more sensitive. Once hydrogen peroxide seeps into the ear, or the eardrum, the consequences are very serious and may cause migraines. Secondly, the ear and the mouth are connected, if you use a high concentration of hydrogen peroxide to wash the ear, it may trigger poisoning, leading to ear inflammation, and cause otitis media, or otitis externa and so on.