Actinomycosis natural history

Overview
Once in the tissue, it forms an abscess, producing a hard, red to reddish-purple lump, often on the jaw, from which comes the condition's common name, "lumpy jaw." Eventually, the abscess breaks through the skin surface to produce a draining sinus tract. With treatment, it is completely treatable.

Possible Complications
Meningitis can rarely develop from this infection.