While there are many conditions where the pain is the condition itself, there are also many other health conditions that cause chronic pain as one of the primary symptoms, including any pain that persists for longer than 3 months due to the health condition. All types of arthritis are some of the most common causes of chronic pain as arthritis causes the affected joints to swell and stiffen, causing immense pain in many patients. Other common pain conditions include fibromyalgia, peripheral myopathy, complex regional pain syndrome, and some spinal conditions such as sciatica, an injury that causes whiplash, and degenerative disc disease. Cancer is a type of health condition that is not directly a pain condition but commonly causes chronic pain in patients.