I've had degenerative disc disease since I was 17. Recently I have begun to develop pain in my upper back and neck, as the settings on my sleep number that help my low back the most aggravate my neck. My doc's attribute my upper back and neck issues to muscle spasms. Using this pillow has made a huge difference and aligns my head properly, which has helped alleviate and reduce the headaches, stiff neck and shoulder muscles, and frequency of teeth grinding. My only complaint is that they don't sell the pillow cases separately and in colors other than white.