Osteitis pubis (OP) is a term used to describe an entity characterised by severe pelvic pain, a wide-based gait and bony destruction of the margins of the pubic symphysis. It is usually assumed that OP is a non-infectious, self-limiting, relatively benign condition. Infectious osteomyelitis of the symphysis pubis (IOSP) is very unusual and the clinical presentation can resemble OP. IOSP following inguinal hernia repair is extremely rare. A case of IOSP caused by Pseudomonas aeruginosa is described. We reiterate the assumption that IOSP can be misdiagnosed as OP.