Originally posted 2012-08-08 03:10:57. Republished by Blog Post Promoter Chronic suppurative otitis media (CSOM) is caused by recurrent ear infections resulting to tympanic membrane perforation characterized by persistent foul smelling otorrhea from the middle ear. Misconception on ear infection as related to poor hygiene and embarrassing foul smelling ear discharges, generates an erroneous notion of...