If the patient has an auricular trauma, clinically start with a peroxide rinse and then you can follow up with iodophor. Not a lot of rinsing is done with alcohol, which primarily allows for wiping of the wound area. If alcohol rinsing, the alcohol concentration is too high, it will make the patient’s injured area have obvious severe pain. If the patient is pus in the ear canal, the ear canal needs to be disinfected, clinically, you can start with hydrogen peroxide ear drops for ear drops, and then you can use the right amount of iodine for rinsing can also be. But the use of alcohol rinse less, because alcohol will be inside the ear canal and the tympanic membrane and the mucosa of the tympanic chamber, produce a greater burning damage, so that the patient produces severe pain, so now rarely use alcohol to wash the ear. Individual patients with fungal otitis externa, can be short-term application of boric acid alcohol ear drops for ear drops.