Understanding Shoulder Arthritis:
Symptoms, Causes & Treatment Options
The shoulder joint is a ball-and-socket joint. The ball is the rounded end of your humerus (upper arm bone), called the humeral head. The socket is part of your shoulder blade (scapula), called the glenoid. This design allows a wide range of motion, making the shoulder one of the most flexible joints in the body.
What is Shoulder Arthritis?
Shoulder arthritis happens when the smooth articular cartilage that lines the joint wears down. Normally, this cartilage allows the joint to move easily and pain-free. With arthritis, the protective surface becomes thin or disappears, leaving bone rubbing on bone. This can cause pain, stiffness, and reduced function.
Types of Shoulder Arthritis
- Osteoarthritis – also called “wear-and-tear arthritis” or “degenerative joint disease.” This is the most common form, where cartilage gradually breaks down and exposes raw bone surfaces.
- Rheumatoid arthritis – an autoimmune condition that causes chronic joint inflammation. Over time, this inflammation can damage cartilage and bone, leading to pain and deformity.
- Post-traumatic arthritis – develops after a shoulder injury such as a fracture or dislocation, which may accelerate cartilage wear.
Symptoms of Shoulder Arthritis
Symptoms can vary but usually worsen over time. Common signs include:
- Deep shoulder pain that may worsen with movement or at night
- Stiffness and reduced range of motion (difficulty reaching overhead or behind your back)
- Grinding, clicking, or catching sensations in the joint
- Weakness when lifting or rotating the arm
How is Shoulder Arthritis Diagnosed?
Diagnosis involves a careful medical history, physical examination, and imaging. Your surgeon may recommend:
- X-rays to show loss of joint space, bone spurs, or deformity
- MRI scans if soft tissue damage such as a rotator cuff tear is suspected
- Physical tests to check your range of motion, strength, and pain response
Treatment Options for Shoulder Arthritis
Management depends on the severity of symptoms and your goals. Options include:
Non-Surgical Treatments
- Activity modification – avoiding repetitive overhead use and heavy lifting
- Physiotherapy – strengthening surrounding muscles to improve support and function
- Medications – anti-inflammatory tablets or pain relief
- Joint injections – corticosteroid or biologic injections to reduce pain and inflammation
Surgical Treatments
- Arthroscopy – minimally invasive “keyhole surgery” to clean the joint and remove loose fragments (for early arthritis)
- Shoulder replacement surgery – replacing the worn ball and socket with implants. Types include:
- Total shoulder replacement
- Reverse shoulder replacement (for arthritis combined with rotator cuff damage)
- Hemiarthroplasty (replacing only the ball)
Results and Recovery
With the right treatment, most patients experience significant pain relief, improved mobility, and better quality of life. Shoulder replacement surgery has excellent long-term outcomes, especially when combined with a structured rehabilitation program.
When to Seek Help
If you have ongoing shoulder pain, stiffness, or loss of function affecting your daily activities or sleep, it’s time to see a shoulder specialist. Early diagnosis and tailored treatment can slow progression and improve outcomes.
Shoulder Arthritis — Frequently Asked Questions
What is shoulder arthritis?
Shoulder arthritis is wear and tear or inflammation that damages the smooth cartilage lining the ball-and-socket joint (humeral head and glenoid). As cartilage thins, bone rubs on bone, causing pain, stiffness, and loss of movement.
What are common symptoms?
Deep shoulder pain (often worse at night), stiffness, grinding or clicking, reduced reach (overhead/behind back), and weakness when lifting or rotating the arm.
How is shoulder arthritis diagnosed?
Clinical assessment plus imaging. X-rays show joint space loss or bone spurs. An MRI may be used if a rotator cuff tear or other soft-tissue issues are suspected.
Do I always need surgery?
No. Many people improve with physiotherapy, activity changes, anti-inflammatory medication, and targeted injections. Surgery is considered if pain and function don’t improve.
What non-surgical treatments help?
Guided exercise therapy, activity modification, oral anti-inflammatories or analgesics, and corticosteroid or biologic injections to reduce joint inflammation.
When is shoulder replacement recommended?
When pain limits sleep or daily life despite non-surgical care. Options include total shoulder replacement, reverse shoulder replacement (if rotator cuff is deficient), or hemiarthroplasty in select cases.
What is the difference between total and reverse shoulder replacement?
Total replacement keeps the natural ball-and-socket orientation and needs a working rotator cuff. Reverse replacement switches the ball and socket to let the deltoid muscle power the arm when the cuff is torn or non-functional.
How long is recovery after shoulder replacement?
Most return to light activities by 6–8 weeks, with strength and function improving for 6–12 months. Results are best with a structured rehabilitation program.
Can exercise help shoulder arthritis?
Yes. Targeted strengthening and mobility exercises reduce pain and improve function. A physiotherapist will tailor a safe plan and progress it as symptoms settle.
When should I see a specialist?
If shoulder pain or stiffness affects your work, sport, or sleep, or if home measures aren’t helping, book a review with our shoulder specialists.