Stiff Shoulder vs Frozen Shoulder: How to Tell the Difference

The shoulder joint is wrapped in a sleeve of connective tissue called the joint capsule. In frozen shoulder, excess scar-like tissue, or adhesions, builds up in that capsule. The result is pain, stiffness and a loss of both active motion (moving the arm yourself) and passive motion (someone else moving it while you relax) [R18].

That loss of passive motion is an important clue. A shoulder that is only tight from use may still move well when someone else helps. A frozen shoulder usually does not, at least not well. Clinicians check this carefully, along with other causes, before they name a condition.

Stiff shoulder, in everyday language, covers a range of causes. Long periods of sitting, sleeping in one position, a period of less use, or an old injury can all leave a shoulder feeling tight. Evidence on the exact causes varies, so ask your clinician about your own situation.

Only a doctor or physiotherapist can diagnose frozen shoulder. They examine the joint, check movement in several directions and rule out other problems. You cannot reliably diagnose it at home. If you want more background, see why shoulders get stiff as we age, stiff shoulders in the morning and why stretching alone doesn't fix stiff shoulders.

• Frozen shoulder can start on its own or follow surgery or an injury. It is a real condition with a known pattern of stiffness in both active and passive motion [R18].
• The idea that frozen shoulder reliably passes through freezing, frozen and thawing stages to full recovery without treatment is not supported. In untreated cases, people improved only partly after one to four years [R19]. This is why waiting it out is not advised; a clinician should assess it.
• Exercise-based care helped pain and range of motion in middle-aged and older adults with rotator cuff-related shoulder pain [R04]. That research was not about frozen shoulder, so it does not tell us what is right for you.
• Most shoulder pain is managed in primary care with advice and exercise. Acute, severe pain after an injury needs proper diagnosis [R30].

1. Get assessed if movement is limited in every direction. If you cannot move the shoulder much even when someone else helps, book a visit with a doctor or physiotherapist.
2. Ask about a safe movement plan. Ask what range is comfortable, what to avoid, and how to progress over time. Many clinicians suggest moving within a comfortable range rather than forcing the joint.
3. Until you are seen, keep to gentle, pain-limited movement. Seated, let the arm hang and make small, slow circles. Stop well short of sharp pain.
4. Use daily tasks as gentle movement. Reach for a cup or comb your hair while seated, and stop before the stretch becomes painful.
5. Watch for changes. Night pain that gets worse, new weakness, or swelling means it is time for a clinical check.