why is fibromyalgia and hip bursitis so related

I have had fibromyalgia for 15 years and hip bursitis for 5 years. the more research I do the more I see how related they are. I am to the point after various therapies to consider using a walker at 55 years old. It is difficult for me to walk and to climb stairs. I use to be very active. Is there any research indicating why these two are so synonymous?

[FurballsMom]

I don't know, but I definitely have both problems.  I understand the difficulty.  Thankfully, my apartment building is required to have elevators.