Shoulder Pain When Raising the Arm: Causes and What They Mean

The shoulder is built like a hinge with a very generous margin of freedom: the head of the humerus is noticeably larger than the glenoid cavity of the scapula, and stability is provided mainly by muscles, tendons, and ligaments rather than by the bone itself. That is precisely why the shoulder is easy to injure. And that is precisely why pain when raising the arm can point to a specific structure — a tendon, a bursa, the joint, or a nerve.

Why the shoulder hurts when raising the arm

When raising, the arm works as a lever, and the fulcrum is the shoulder joint. The head rotates within the socket. Anatomy also explains a practical limit: flexion and abduction are possible only up to shoulder level; beyond that, the movement is carried out by the entire limb together with the shoulder girdle.

The shoulder joint is the most mobile in the body and at the same time one of the most vulnerable: it has no true ligaments and is stabilized by muscles, which is why dislocations occur frequently. Three bones form the joint — the clavicle, the scapula, and the humerus — and its movements are varied: flexion and extension, abduction and adduction, circular movements, and internal and external rotation.

Lesions of the tendons and bursa of the shoulder joint

Causes include tendinitis (inflammation of a tendon), bursitis (inflammation of the synovial bursa), and impingement. Pain is often worse when using the arm or shoulder. The list of common shoulder problems also includes rotator cuff tears. It also includes strains and overuse, dislocations, separations of the joints, frozen shoulder, and fractures.

Injuries and arthritis of the shoulder joint

Sharp pain after a fall, when the arm cannot be moved or the shape of the shoulder changes, is a dislocation, a fracture (of the humerus or clavicle), or a tendon tear. Arthritis — osteoarthritis or rheumatoid — behaves differently: pain and stiffness persist for months and years. Adhesive capsulitis lasts just as long. A separate area is the acromioclavicular joint: there the pain sits on top of the shoulder, at the junction of the clavicle and the joint, and may be associated with dislocation or with sprain and rupture of the ligaments.

Shoulder and arm pain: instability and nerves

If tingling, numbness, and weakness in the arm are added to the pain, along with clicking or a sensation of locking, the cause may be shoulder instability, including on a background of hypermobility, when the joint is held less securely than usual. Nerve lesions include brachial plexus plexopathy.

How a doctor finds the cause: examination, ultrasound, MRI

The diagnosis is based on the medical history and physical examination; if necessary, the doctor may refer the patient for testing. A diagnosis cannot be made from a description of the pain alone — an examination is needed.

• X-ray;
• ultrasound;
• MRI;
• CT;
• arthrography.

When shoulder pain requires urgent medical attention

The usual benchmark is two weeks: if the pain has not begun to subside during this time or the arm is difficult to move, a doctor is needed. Recovery can take six months or longer, so a slow pace is not in itself alarming. What is alarming is a sudden onset and neurological symptoms.

Shoulder pain by itself is not a reason to call an ambulance; 103 or 112 are needed if the shoulder has become sharply and severely painful after a fall or injury, the arm cannot move, or the shape of the shoulder has changed.

Urgent medical attention is needed if tingling and numbness do not go away, the skin on the shoulder is hot or cold to the touch, severe swelling has appeared, the temperature has risen, and there is general malaise.

This material is for reference: it helps you understand what to discuss with a doctor, but it does not replace a consultation — the cause of the pain cannot be determined from the text.

This content is for reference and does not replace a doctor's consultation. Medical disclaimer