Polymyalgia Rheumatica

From The American College of Rheumatology:

Fast Facts

The typical polymyalgia rheumatica symptoms (what you feel) of PMR are aching and stiffness about the upper arms, neck, lower back and thighs.
These symptoms develop quickly and are worse in the morning.
Polymyalgia rheumatica symptoms respond promptly to low doses of corticosteroids, but may recur as the dose is lowered.

Polymyalgia rheumatica (sometimes referred to as PMR) is a common cause of widespread aching and stiffness that affects adults over the age of 50, especially Caucasians. Because polymyalgia rheumatica does not often cause swollen joints, it may be hard to recognize. It may occur with another health problem, giant cell arteritis.

The average age when symptoms start is 70, so people who have PMR may be in their 80s or even older. The disease affects women somewhat more often than men. It is more frequent in whites than nonwhites, but all races can get PMR.

For more information:

https://www.rheumatology.org/I-Am-A/Patient-Caregiver/Diseases-Conditions/Polymyalgia-Rheumatica