Some kinds of chronic, or on-going, pain have many causes. One of them might be diseases, such as rheumatoid arthritis, osteoarthritis, and fibromyalgia. Other sources of constant pain can include cancer, multiple sclerosis, stomach ulcers, AIDS, and gallbladder disease.
But it’s often hard or even impossible to untangle all thee causes behind chronic pain. It may start with a physical cause, and then turn into a more complex problem involving your mind, mood, and lifestyle. That’s why doctors many times have to try different therapies to find the one that works for you.