Chronic Pain: Chronic pain is pain that persists for a period of six months or longer, and is the result of a long-standing medical condition(s) or damage to the body. Common sources of chronic pain include headaches, back pain, and arthritis. There are several types of pain including general somatic pain, visceral pain, bone pain, muscle cramps, neuropathy, circulatory problems, and headache pain. Chronic pain may be managed with over-the-counter or prescription medications.