Osteitis is inflammation of bone. More specifically, it can refer to one of the following conditions:Osteomyelitis, or infectious osteitis, mainly bacterial osteitis Alveolar osteitis or "dry socket" Condensing osteitis Osteitis deformans Osteitis fibrosa cystica Osteitis pubis Radiation osteitis Osteitis condensans ilii Panosteitis, a long bone condition in large breed dogs In horses, pedal osteitis is frequently confused with laminitis.