When the weather warmed up recently, Ms. Li’s daughter Linlin’s cold gradually improved, but when she was almost well, she started crying again and couldn’t sleep. 10-month-old Linlin couldn’t talk yet, but kept crying and scratching her ears with her hands, and when Ms. Li took a closer look at her daughter’s red and swollen ears, she realized that pus was flowing inside. The shocked Ms. Li immediately took her daughter to the hospital’s ear, nose and throat department for a checkup, only to learn that Linlin was suffering from otitis media. “She was very careful not to pull out her ears and never let water in her ears when she took a bath. How did she get otitis media?” Ms. Li was puzzled. The ear structure is different and children are susceptible to infection. If a child has a cold, it can easily cause otitis media if not handled properly, which is related to the ear, nose and throat structure of children. The middle ear is a small space inside the eardrum, which is connected to the nasopharynx through the eustachian tube. The eustachian tube is a “tube” that runs diagonally between the human ear and the pharynx. In adults, the eustachian tube is usually located at an angle of 45 degrees diagonally downward between the femoral chambers in the ear, but in children, the eustachian tube is almost horizontal and the lumen is short and wide. If you have a respiratory infection, such as a cold, acute rhinitis or acute pharyngitis, bacteria can easily enter through the eustachian tube and gather in the middle ear cavity to cause inflammation. Normally, the eustachian tube closes into a gap and only opens when a person opens his or her mouth, swallows, yawns, sneezes, etc., allowing outside air to enter the middle ear and maintain the pressure balance inside and outside the middle ear. However, once a person has a cold or sinusitis, the mucous membrane of the nasopharynx can easily become congested and edematous, compressing the adjacent eustachian tube and causing it to become blocked. At this time, when a person opens his mouth and swallows, the eustachian tube cannot be opened, resulting in the outside air not being replenished into the middle ear in time, causing the pressure outside the middle ear to greatly exceed that inside the middle ear, which in turn causes the mucous membrane of the middle ear to become vasodilated and bruised, leading to secretory otitis media. As we enter winter, the number of children with otitis media caused by upper respiratory tract infections is gradually increasing, and now he receives several such cases almost every day, some of which are even serious enough to affect the child’s hearing and other problems. ”Parents do not know enough about otitis media in children, and often wait until their children’s eardrums are congested and red, or even after pus comes out of the ears, to find out that their babies have otitis media.” Yin Shihua talked about how the key to preventing pediatric otitis media is to prevent colds, and if you have a cold, to treat it in a timely manner to kill the bacteria to avoid infection. In addition, when many children are sick, parents choose to go to pediatrics, but if it is a disease of the ear, nose and throat, you need to go to a specialist to identify the condition through professional examination techniques in order to get timely treatment. Children who have not yet spoken are more likely to be neglected by parents when they have otitis media, and parents need to be more alert. When a child rubs his or her ears frequently and cries, it is important to check carefully. In addition, many parents like to feed their babies lying down, and when feeding them too quickly, or if the hole in the pacifier is too large, the baby will not be able to swallow in time, causing choking, and the milk will easily enter the middle ear through the eustachian tube, laying a “hidden danger” for otitis media.