After the operation of otitis media, you should be very careful. According to the requirements of the surgeon, you should regularly go to the hospital to change the dressing. In addition, the ear canal should avoid water ingress. Those who love swimming should pay attention to that. It is better not to swim within a year in the near future. You should take good protection according to the recommendations of your surgeon. In addition, when washing your hair and taking a bath, you should pay attention not to let water enter the ear canal. In addition, you should avoid suffering from upper respiratory tract infection. We are talking about colds, because after a cold, bacteria will enter the middle ear through the eustachian tube, which will lead to otitis media again. In addition, don't pinch your nose and blow your nose hard after you have a cold. When you blow your nose hard, one of the airflow will come out of the nasal cavity. In addition, if you use too much force, the airflow will enter the middle ear through the eustachian tube, which will bring bacteria into the middle ear, which will cause inflammation of the middle ear. In addition, keep the ear canal clean, often use a cotton swab dipped in a little alcohol to clean the ear canal and wipe it. In case of discomfort, go to the hospital to see the doctor. Don't treat it by yourself.