What is "periostitis"

Periostitis \Per`i*os*ti"tis\, n. [NL. See Periosteum, and -itis.] (Med.) Inflammation of the periosteum.

n. Inflammation of a periosteum.

Periostitis, also known as periostalgia, is a medical condition caused by inflammation of the periosteum, a layer of connective tissue that surrounds bone. The condition is generally chronic, and is marked by tenderness and swelling of the bone and an aching pain.