Nowadays, many young mothers are used to letting their children lie down and take milk due to their lack of experience in childcare. In fact, this practice is wrong. Because the eustachian tube of infants and children is shorter, wider and flatter than that of adults, if the nursing position is improper, especially when crying, such as lying down to suck milk, milk or vomit will flow into the middle ear through the eustachian tube, causing otitis media. In addition, parents should pay special attention to the fact that nasal congestion in children with colds can cause swelling of the mucous membrane around the eustachian tube and poor opening of the tube, in addition, vigorous nose blowing can easily cause snot to flow into the middle ear through the eustachian tube, resulting in otitis media. Therefore, you should avoid blowing the nose vigorously to prevent otitis media. If your child is infected accidentally, you should control the infection with a sufficient amount of antibiotics as soon as possible until the symptoms subside 5~7 days later, and then stop the medication to ensure complete cure.