The rotator cuff is the group of four muscles that hold the shoulder joint in place and control the arm as you lift and rotate it. Most shoulder pain that is not caused by a fall involves the rotator cuff, the tendons around it, or the way the shoulder blade moves.

What it feels like

• Pain on the outside of the upper arm, often more than in the shoulder itself
• Difficulty lifting the arm overhead, or a painful arc partway up
• Pain reaching behind your back, or into a coat sleeve
• Trouble sleeping on that side — one of the most common complaints
• Weakness lifting or carrying, or a feeling that the arm gives way

Common causes

• Rotator cuff tendinopathy — overload of the tendon, the most common cause
• Subacromial pain, where tendons are compressed as the arm lifts
• Rotator cuff tears, either gradual with age or sudden after a fall
• Frozen shoulder (adhesive capsulitis) — progressive stiffness in every direction
• Shoulder blade control problems, which change how the joint moves
• Referred pain from the neck — see our page on neck pain

How physiotherapy helps

For most rotator cuff problems, including many partial tears, a progressive loading programme is the first-line treatment and compares well with surgery in the research. Treatment usually involves:

• Progressive rotator cuff loading — the core of treatment, built up gradually over weeks
• Shoulder blade and postural retraining
• Manual therapy to restore range where the joint is stiff
• Activity modification so the tendon settles without you stopping everything
• Sleep positioning advice, which often brings the quickest relief
• The Super Inductive System, laser therapy or dry needling to help manage pain during the loading programme

Frozen shoulder follows its own timeline and needs a different approach — maintaining range through the painful phase, then restoring it. Your physiotherapist will tell you which pattern you fit.

How long does it take?

Tendon problems respond to loading, but tendons adapt slowly. Expect a programme measured in months rather than weeks, with meaningful improvement usually starting within the first six to eight weeks. Consistency matters more than intensity.

When to see a doctor instead

See a physician if you cannot lift your arm at all after a fall, if the shoulder looks visibly out of place, or if there is significant bruising, swelling or deformity. Shoulder pain with chest tightness, breathlessness or jaw pain needs emergency assessment.

Booking an appointment

You do not need a doctor’s referral to see a physiotherapist in Ontario. Some extended health plans ask for one before they will reimburse you, so it is worth checking your policy.

We are at 2600 Skymark Avenue, Building 3, Unit 102, Mississauga, open Monday to Friday 9:00 AM – 10:00 PM and Saturday and Sunday 9:00 AM – 7:00 PM, with free parking. See our fees or call 647-998-4727.

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This page is general information, not medical advice. An assessment with a registered physiotherapist is the way to find out what is causing your symptoms and what will help.