Cause of blood stained discharge in COM AAD

External ear

1)      Otitis externa

2)      Malignant otitis externa

3)      Trauma due to cleaning of ear

4)      Otomycosis

5)      EAC granulations

Middle ear

  1) Bleeding from capillaries in mucosa of middle ear on erosion

                        2) Osteitis & granulations

                        3) Acute necrotizing otitis media

                        4) Dural plate erosion & dural bleed

                        5) Sigmoid plate erosion & bleed

                        6) Bleeeding from vasa vasorum of facial nerve