Final answer:
Chronic low back pain and myofascial pain syndrome are classified as chronic benign pain. This type of pain persists and is often associated with inflammation and immune system activity. Treatment options vary depending on the pain's severity and nature. (Option c)
Step-by-step explanation:
Chronic low back pain and myofascial pain syndrome are examples of c. chronic benign pain. Chronic pain, such as these conditions, often persists after the initial injury has healed. Chemical messengers of the immune system, like macrophages, contribute to the maintenance of this pain by promoting sterile inflammation. It is this inflammation that can sometimes lead to a coordinated response that results in chronic pain signals being amplified and maintained.
Furthermore, pain can be classified as either inflammatory or neuropathic. Inflammatory pain denotes the presence of tissue damage, whereas neuropathic pain can occur when there is damage to the neurons in the peripheral or central nervous system, leading to exaggerated pain signals sent to the brain.