Final answer:
Chronic pain is pathological and can be treated by analgesic drugs. It can persist even after tissue has healed. Treatment options depend on various factors. Hence the correct answer is option D
Step-by-step explanation:
Chronic pain is pathological and can be treated by analgesic drugs. It is not solely caused by short-term changes in the nervous system, but can persist even after damaged tissue has healed. Chronic pain can be inflammatory or neuropathic in nature, and its treatment depends on various factors including the severity and persistence of the pain and any underlying medical conditions.
Hence the correct answer is option D