1, infection can also lead to otitis media. In the past, it was thought that secretory otitis media, is aseptic inflammation. In recent years, the study found that: the middle ear effusion in the bacterial culture positive, about 1/2-1/3, of which the main causative organisms, for Haemophilus influenzae, Streptococcus pneumoniae. Bacteriologic and histologic findings, as well as clinical signs indicate that secretory otitis media, may be a mild, low-toxicity bacterial infection of the middle ear. The bacterial product, endotoxin, may play a role in the pathogenesis, especially in the chronicity of the lesion.

2, the causes of otitis media are: immune response. Pediatric immune system, not yet fully developed, which may also be pediatric secretory otitis media, one of the reasons for the higher incidence.

3, the cause of otitis media is also: Eustachian tube dysfunction. It is generally believed that this is the basic cause of this disease.