Osteoarthritis is the most common form of arthritis. Progressive loss of cartilage at the edges of the joints and in the underlying bone causes osteoarthritis.
Arthritis literally means inflamed joint; however, there often is little inflammation in osteoarthritis. Osteoarthritis is a normal part of the aging process.
The pain from Paget’s disease is sometimes mistaken as pain from osteoarthritis.
See the topic Osteoarthritis.