Chronic Pain

**Definition:** Aching sensation that persists for more than a few months. It may or may not be associated with trauma or disease, and may persist after the initial injury has healed. Its localization, character, and timing are more vague than with acute pain.

**Tree numbers:** - C23.888.592.612.274 - F02.830.816.444.433 - G11.561.790.444.461

**Synonyms:** - Pain, Chronic