As we age, the risk of shoulder osteoarthritis rises, leading to pain and reduced mobility. Injuries like shoulder dislocations can trigger it even in younger people. This guide draws on clinical insights to explain causes, symptoms, and proven treatments, empowering you to manage the condition and maintain daily function.
What is osteoarthritis?
Osteoarthritis, also known as degenerative joint disease, develops when articular cartilage—the protective layer covering bone ends in joints—wears down. This friction causes inflammation, pain, and often bone spurs (osteophytes) as bones rub together.
What is shoulder osteoarthritis?
The shoulder features two key joints: the acromioclavicular (AC) joint, where the collarbone (clavicle) meets the acromion (tip of the shoulder blade), and the glenohumeral joint, where the humerus (upper arm bone) meets the glenoid cavity of the scapula (shoulder blade). Osteoarthritis typically affects the AC joint.
Who is most at risk?
It's most common after age 50. In younger people, post-traumatic osteoarthritis can follow injuries like fractures or dislocations. Genetics play a role too, and it's twice as prevalent in women as men.
Symptoms of shoulder osteoarthritis
Pain is primary, arising during movement, after repetitive use, or at night. Limited range of motion becomes evident when lifting the arm or during assisted tests. Crepitus—clicking or grinding—often occurs with motion.
Read more about osteoarthritis, its symptoms, diagnosis, and tips for Moving without pain.
