Prolonged and frequent exposure to second-hand smoke can easily trigger otitis media. Prolonged and frequent exposure to second-hand smoke, the harmful substances in the smoke constantly on the sinuses, pharynx stimulation, it is easy to let the nasopharyngeal secretion increase, if the blockage of the Eustachian tube pharyngeal opening, may affect the middle ear drainage, thus triggering otitis media. In addition, long-term exposure to second-hand smoke is also prone to upper respiratory tract infections, when pathogens enter the middle ear through the Eustachian tube, may also cause otitis media. However, not as long as the exposure to second-hand smoke will definitely get otitis media, generally speaking, if the number of times of exposure, or exposure time is shorter, usually does not cause otitis media. Secondhand smoke is very harmful, usually try to stay away from, suffering from otitis media, need to actively cooperate with the doctor for treatment.