Shoulder Pain & Rotator Cuff Problems: Causes and Treatment

Quick answer

Most shoulder pain in adults comes from the rotator cuff, the group of four muscles and tendons that steady the shoulder and help lift the arm. Pain on the outside of the upper arm, worse when lifting the arm or lying on it, is typical. Most rotator cuff pain improves with a structured exercise programme over about three months. A sudden inability to lift the arm after a fall is different: it can mean a tendon tear and should be assessed within days.

Written and medically reviewed by

Dr Udit Vinayak M.S. Orth (Gold Medalist)

Dip. FIFA, A.O Fellow, FIJR

Trauma, Sports Medicine & Joint Replacement Surgeon, VinayakM Health

Last reviewed:

September 27, 2026

Overview

The shoulder trades stability for movement: it has the widest range of any joint in the body. The rotator cuff keeps the ball centred in its shallow socket while the bigger muscles move the arm. Its tendons pass through a narrow space under the bony tip of the shoulder, the acromion.

When these tendons are overloaded, irritated or worn, lifting the arm becomes painful. Doctors may call this rotator cuff tendinopathy, subacromial pain or "impingement". Other causes include tears of the tendons, calcium deposits within them, arthritis of the small joint at the top of the shoulder, instability in younger people, and pain referred from the neck.

Symptoms & signs

Pain on the outside of the upper arm, rather than on top of the shoulder.
A painful arc: the arm hurts most between about shoulder and head height, and less at the top.
Pain at night, especially lying on the affected side.
Weakness lifting or turning the arm, which may suggest a tear.
Clicking or catching, and difficulty with overhead tasks.

Causes & risk factors

Overload: a sudden increase in overhead work, lifting, sport or gym training.
Age-related change: tendons become less resilient from the 40s onwards, and many people over 60 have partial tears without symptoms.
Injury: a fall onto the arm or a sudden heavy lift can tear a tendon, particularly in older adults.
Posture and stiffness in the upper back that change how the shoulder blade moves.
Smoking and diabetes slow tendon healing.

When to see a doctor

Sudden inability to lift the arm after a fall or injury: this needs assessment within days, because early repair of an acute tear can matter.
A shoulder that looks deformed, or feels as if it has come out of joint.
Chest pain, breathlessness or sweating with shoulder or arm pain: call for emergency help.
A red, hot, swollen shoulder, or fever.
Numbness, tingling or weakness spreading down the arm.

How it’s diagnosed

A clinician tests the strength of each rotator cuff muscle, checks where movement becomes painful and examines the neck, because neck problems commonly cause shoulder pain.

Ultrasound or MRI is used when a tear is suspected or when pain has not improved with good treatment. An X-ray can show calcium deposits, arthritis or bone changes. Scans are interpreted alongside the examination, because many shoulders show "tears" on imaging that are not the cause of the pain.

Treatment options

Exercise-based physiotherapy is the main treatment: strengthening the rotator cuff and the muscles that control the shoulder blade, with the load built up gradually over about 12 weeks.
Load management: reducing, not stopping, the activities that provoke pain.
Pain relief: simple painkillers or anti-inflammatories if suitable.
Steroid injection: can ease pain for a few weeks, which helps exercise. It is not a cure on its own, and repeated injections are avoided.
Surgery: considered for acute tendon tears in active people, for tears that keep causing pain and weakness despite rehabilitation, and for some calcium deposits.

Shaving bone from under the acromion (subacromial decompression) was once a very common operation for shoulder pain. A large UK trial (CSAW) found it was no better than a placebo keyhole procedure in which nothing was removed, which is why exercise now comes first.

How VinayakM helps

At VinayakM, shoulder pain is assessed by examination first, with scans used only when they will change the plan.

An orthopaedic opinion that separates rotator cuff pain from frozen shoulder, arthritis, instability and neck-related pain.
A graded exercise programme with our physiotherapist, adjusted as your strength improves.
Early imaging and surgical advice when an injury suggests an acute tear.

Book your first review Call +91 92171 75397

Prevention & self-care

Build up overhead work, gym training and sport gradually.
Strengthen the shoulder blade and rotator cuff muscles, especially if your work or sport is overhead.
Break up long periods at a desk; stiffness in the upper back affects how the shoulder moves.
Do not ignore sudden weakness after an injury.

Frequently asked questions

Is it a torn tendon or just inflammation?

The examination gives the first clue: marked weakness, especially after an injury, suggests a tear. Ultrasound or MRI can confirm it. Many tears, particularly age-related ones, are managed well without surgery.

How long does rotator cuff pain take to settle?

With a consistent exercise programme, most people improve over about three months. Some take longer, especially if the problem has been present for a long time.

Should I stop using my arm?

No. Complete rest weakens the tendon further. Reduce the activities that clearly provoke pain, and keep the arm moving within comfortable limits.

When is surgery needed?

For acute tears in active people, for tears that keep causing weakness and pain despite good rehabilitation, and for some other specific problems. Shaving bone for pain alone is no longer recommended.

Can shoulder pain come from the neck?

Yes. Neck problems often cause pain over the shoulder blade and the top of the shoulder, sometimes with tingling down the arm. That is why the neck is always examined.

References

National Health Service (NHS). Shoulder pain. — https://www.nhs.uk/symptoms/shoulder-pain/
American Academy of Orthopaedic Surgeons, OrthoInfo. Rotator cuff tears. — https://www.orthoinfo.org/diseases--conditions/rotator-cuff-tears/
Beard DJ, Rees JL, Cook JA, et al. Arthroscopic subacromial decompression for subacromial shoulder pain (CSAW): a multicentre, pragmatic, parallel group, placebo-controlled, three-group, randomised surgical trial. Lancet. 2018;391:329–338. — https://doi.org/10.1016/S0140-6736(17)32457-1
Maffulli N, Furia JP (eds). Rotator Cuff Disorders: Basic Science and Clinical Medicine. JP Medical; 2012. (textbook, consulted for background)
Blom A, Warwick D, Whitehouse M (eds). Apley and Solomon’s System of Orthopaedics and Trauma. 10th ed. CRC Press; 2018. (textbook, consulted for background)
Azar FM, Beaty JH, Canale ST (eds). Campbell’s Operative Orthopaedics. 13th ed. Elsevier; 2017. (textbook, consulted for background)

Written in our own words. Textbooks were used as background reading and are cited; no text, figures or tables have been reproduced from them.

This page is for general information and education only. It is not a substitute for a consultation, diagnosis or treatment from a qualified clinician. If you have any of the red-flag symptoms above, seek medical care promptly.