Chronic pains are a type of pain that lasts for a long period of time, often months or years. The term 'chronic pains' is often used to refer to conditions such as fibromyalgia, arthritis, and chronic back pain. The acronym IMPS is used to describe the four main types of chronic pain: inflammatory, musculoskeletal, peripheral neuropathic, and systemic. Inflammatory pain is caused by inflammation in the body, musculoskeletal pain is caused by damage to the muscles, bones, or joints, peripheral neuropathic pain is caused by damage to the nerves, and systemic pain is caused by an illness or disorder that affects the entire body.