has characteristic pain chronic pain Pain that persists or recurs for longer than 3 months, in which each incidence of pain is attributed to the same underlying condition. In many cases, the pain is initially caused by tissue damage or disease. The continuation of the pain is often the result of pathological changes in the central nervous system. https://orcid.org/0000-0001-9625-1899 chronic pain (PAIN) 2022-11-24T06:02:26Z chronic