Many people in a headache group I belong to found this app extremely helpful

For anyone who doesn't want or cannot download the app, Rachel Zoffness, a pain doc, has written a recently published book entitled, The Pain Management Workbook. It is excellent. There is a good chunk of her book available to read for free on Amazon. These sections explain all the parts of the brain involved in producing pain.

Chronic pain can be dialed back and even eliminated with techniques that change how the nervous system reacts, which is neuroplasticity.