Shoulder pain is one of the most common complaints in orthopedics. There are many causes: from simple overuse to serious tendon tears. Understanding the cause is the first step to proper treatment.
1. Rotator cuff injury
Four muscles and their tendons stabilise the shoulder. Tears can be traumatic or age-related; after 60, partial tears are often found in people without pain. Pain on raising the arm, weakness, night pain on the affected side. Treatment: for age-related tears, exercise therapy first, injections during flare-ups. A fresh traumatic tear in an active person should be seen by an orthopaedic specialist within the first weeks: tendon repair gives better results if not delayed.
2. Frozen shoulder (adhesive capsulitis)
The joint capsule becomes inflamed and thickened, and movement is gradually lost. The condition passes through three phases and lasts 1–3 years; it is more common with diabetes and thyroid disease. Treatment: mobility exercises, pain relief, a corticosteroid injection in the early phase, sometimes hydrodilatation. In most people movement eventually returns fully or almost fully.
3. Impingement syndrome
Pain when raising the arm through an arc of 60–120°, worse with overhead work. Treatment: an exercise programme for the shoulder-blade and cuff muscles, NSAIDs, an injection if needed. Surgery (acromioplasty) showed no advantage in sham-controlled trials, so it is rarely performed.
4. Calcific tendinitis
Calcium deposits in a cuff tendon; during resorption the pain can be severe. Treatment: shockwave therapy, ultrasound-guided lavage of the deposit, an injection; in many people the deposits resorb on their own over time.
5. Shoulder osteoarthritis
Cartilage wear after injury, instability or with age. Treatment: exercise and pain relief; injections reduce pain but do not restore cartilage. With severe pain and limited movement, joint replacement — anatomical or reverse — is discussed.
6. Shoulder instability
After a first dislocation, young people have a high risk of further dislocations. Treatment: strengthening the shoulder and shoulder-blade muscles; after recurrent dislocations, especially in young people and athletes, surgery (Bankart or Latarjet stabilisation) is more often recommended. Injections do not strengthen the capsule or ligaments.
7. Shoulder bursitis
Inflammation of the subacromial bursa, often together with impingement. Treatment: offloading, NSAIDs, exercises and, if needed, a corticosteroid injection (no more than 2–3 times a year).
When to see a doctor
Urgently — after an injury with sudden arm weakness or a visible deformity. Routinely — if pain lasts more than 4–6 weeks, disturbs sleep or prevents raising the arm. More on conditions in the shoulder section.

