If middle ear infections happen often enough, placement of tubes are often helpful. Why would placing a tube help in these situations? Really, tube placement is a "detour" whereby the natural eustachian tube is bypassed so that ventilation occurs through the ear canal instead of the nose. Furthermore, a tube allows for ear popping automatically. Another way of thinking about a tube is a hole in a balloon. When there is a hole in a balloon, no pressure can build up as it would automatically escape out the hole. Read about the different types of tubes here .