By: Kasey E. Garringer PhD and Declan J. Broeg PhD


Osteoarthritis is a bone disease in which the joint surface wears away and sheds particles which stimulate the joint lining to produce fluid, causing the joint to swell.

The main symptom is pain, causing loss of ability and stiffness. Pain is described as a sharp ache/burning sensation near muscles and tendons. Commonly affects hands, feet, spine, hips, and knees, but any joint can be affected.