Shoulder Stiffness or Tightness

Tight shoulders vs a stiff shoulder joint

It helps to separate two different problems:

• Muscle tightness: the trapezius and other muscles running from the neck to the top of the shoulder feel tight, knotted and sore. You can still move the shoulder fully. This is very common.
• Joint stiffness: the shoulder joint itself has lost range of motion. You cannot lift your arm overhead or rotate it outward, even when someone else tries to move it for you. This points to the joint capsule or cartilage.

Common causes

Posture, stress and desk work

Long hours at a computer or phone, with the head forward and shoulders rounded, overload the neck and upper shoulder muscles. Stress makes people hold their shoulders up and tense. The result is tight, aching muscles, often with neck stiffness and tension headaches.

Frozen shoulder

Frozen shoulder, or adhesive capsulitis, is inflammation and thickening of the joint capsule. It typically affects people aged 40 to 60, more often women and people with diabetes or thyroid disease. It has three phases:

1. Freezing (weeks to months): increasing pain, often worse at night, and gradually reducing movement.
2. Frozen (months): pain eases but stiffness is marked. Turning the arm outward is most limited.
3. Thawing (months to years): movement gradually returns.

The whole process often takes 1 to 3 years.

Rotator cuff problems

The rotator cuff is a group of four tendons that stabilize and move the shoulder. Rotator cuff tendinopathy and tears cause pain over the outer shoulder, worse lifting the arm out to the side or overhead, and at night. People often feel stiff because pain stops them moving, but a doctor can usually move the arm further than they can (unlike frozen shoulder). Weakness suggests a tear.

Shoulder osteoarthritis

Shoulder arthritis causes gradual stiffness, aching, and grinding or clicking, usually in older adults or after old injuries.

After injury or surgery

A fracture, dislocation or surgery, followed by keeping the arm still in a sling, often leaves the shoulder stiff. Early, guided movement prevents this.

Other causes

• Polymyalgia rheumatica: aching and stiffness in both shoulders and hips, worst in the morning and lasting more than 45 minutes, in people over 50. It responds dramatically to low-dose steroids.
• Neck problems: a pinched nerve in the neck (cervical radiculopathy) causes shoulder and arm pain with tingling or weakness.
• Calcific tendinitis: calcium deposits in a tendon causing sudden, severe pain and stiffness.
• Rheumatoid arthritis and other inflammatory arthritis.
• Stroke and Parkinson's disease: can make the shoulder stiff on the affected side.
• Heart pain: occasionally felt in the left shoulder, usually with chest symptoms.

Clues to the cause

How doctors assess a stiff shoulder

A doctor will compare how far you can move your arm yourself with how far they can move it, test strength in different directions, and check your neck. Frozen shoulder is mostly a clinical diagnosis. X-rays show arthritis or calcium deposits. Ultrasound or MRI show rotator cuff tears. Blood tests (inflammation markers, blood sugar, thyroid function) help when polymyalgia rheumatica, diabetes or thyroid disease is suspected.

Treatment and exercises

For tight shoulder muscles

• Take breaks from screens every 30 to 60 minutes.
• Raise your screen to eye level and sit back in a supportive chair.
• Use heat, massage and gentle stretching.
• Shoulder rolls: roll your shoulders up, back and down 10 times.
• Upper trapezius stretch: tilt your ear toward your shoulder and hold for 30 seconds each side.
• Strengthen the muscles between the shoulder blades with rows and squeezes.

For a stiff shoulder joint

Gentle, regular stretching within tolerable discomfort helps most causes. Common exercises:

1. Pendulum: lean forward with the arm hanging, and let it swing in small circles for 1 to 2 minutes.
2. Finger walk: face a wall and walk your fingers up as high as is comfortable.
3. Cross-body stretch: use the other arm to pull the stiff arm gently across your chest.
4. Towel stretch: hold a towel behind your back with both hands and use the upper hand to pull the lower one up.
5. Outward rotation with a stick: hold a stick with both hands, elbows by your sides, and push the stiff arm outward.

Medical treatment

• Pain relief: acetaminophen (paracetamol) or NSAIDs at the label dose. Avoid NSAIDs if you have kidney disease, stomach ulcers or take blood thinners.
• Physical therapy: guided stretching and strengthening.
• Steroid injection: reduces pain and inflammation in frozen shoulder and rotator cuff problems, especially early.
• Hydrodilatation: stretching the capsule with an injection of fluid, for frozen shoulder.
• Surgery: releasing the capsule, repairing a torn rotator cuff, or shoulder replacement for severe arthritis.
• Low-dose steroids for polymyalgia rheumatica.

Frequently asked questions

How do I know if I have frozen shoulder?

Frozen shoulder causes gradually increasing pain and then stiffness, so you cannot lift your arm overhead, reach behind your back or turn your arm outward, even with help. It is most common between 40 and 60 and in people with diabetes. A doctor can confirm it by examining your shoulder.

Why are my shoulders always tight?

Constant tightness in the upper shoulders usually comes from posture, especially long hours at a desk or phone, stress and lack of movement. Regular breaks, screen adjustments, stretching and strengthening the upper back usually help. Tightness with arm tingling or weakness should be checked.

Why is my shoulder stiff in the morning?

Short morning stiffness after a night of not moving is common with arthritis and tendon problems. Lying on the shoulder can make it worse. Marked stiffness of both shoulders lasting over 45 minutes each morning in someone over 50 suggests polymyalgia rheumatica.

How long does a stiff shoulder take to heal?

Muscle tightness can ease in days to weeks with stretching. Rotator cuff tendinopathy often improves over 6 to 12 weeks of exercises. Frozen shoulder usually resolves on its own but can take 1 to 3 years, though treatment eases pain and speeds recovery.