Hydrogen peroxide, an ideal ear canal antiseptic, has a very wide range of applications for ear canal cerumen, otitis externa, purulent otitis media and other diseases. For patients with obvious breakage of the ear canal, it is not recommended to use hydrogen peroxide, and there are the following steps for cleaning: First, it is recommended that patients find a doctor, so that the doctor can use a suction device, and carry out the treatment of cleaning inside the ear canal, to clean the ear canal of cerumen and earwax, purulent secretions, etc.. Second, put hydrogen peroxide ear drops into the ear canal, try to fill the ear canal from the inside to the outside, and leave it for 5-10 minutes to fully utilize the bactericidal effect of hydrogen peroxide. Third, the doctor will suck the hydrogen peroxide from the ear canal with a suction device, so that no obvious residue of hydrogen peroxide can be seen by the naked eye, and antibiotic ear drops can be applied to the ear canal to further consolidate the treatment.