Five cases of tuberculous mastoiditis are presented, illustrating the complications that may be expected. These are most commonly facial paralysis, severe or total hearing loss, and postauricular fistula. Two cases with unusual complications are described—one with bilateral proptosis, the other with a cholesteatoma. Tuberculous otitis may be primary (with no other focus in the body), or secondary (due to hematogenous spread or spread up the eustachian tube). Mastoid surgery is undertaken to remove sequestra and to obtain material for histological examination. The response to chemotherapy is satisfactory.