Acute Otitis Media
Acute otitis media is an infection of the middle ear, usually caused by organisms ascending the eustachian tube. Pus is produced in the middle ear, usually by organisms such as streptococcus pneumoniae and haemophilus influenzae. The increased pressure in the middle ear causes the tympanic membrane bulge outwards; this causes pain and eventually a perforation of the parts tensa. In the early stages of acute otitis media examination of the tympanic membrane usually shows a bulging of the tympanic membrane into the canal. The tympanic membrane also usually looks inflamed and erythematous.