I do not know all the different medical conditions that may cause you to experience pain as a result of any underlying conditions, however, you would know if your condition does. Is your pain a part of a primary diagnosis such as Diabetes for example? Is your pain the neuropathic leg pain felt by some diabetics?
Some find that if the primary diagnosis is well managed so is their pain. There are strategies that are specifically designed to meet the medical needs of each diagnosis as well as your individual medical needs. For that reason I cannot attempt to cover them all here, but if your primary diagnosis is managed well and you're following the guidelines set with you, you may find your pain improves.
You may find words like Fibromyalgia, Chronic Fatigue Syndrome or Regional Chronic Pain Syndrome for example, used in these instances to label your pain. Although these are considered medical conditions that are pain related, there are varied thoughts and opinions as to why this type of pain remains even after an injury or illness has healed.
Whether your pain is the cause of an underlying medical condition or you are living with pain after an injury, there are steps you can take in learning to manage your the pain. Education and understanding are the keys to gaining control. The more you know...the more pro-active in your treatment you can be.
take good care of you