Frozen Shoulder Explained: Causes of Pain, Stiffness, and Limited Movement

January 11, 2026 5 min read

Frozen shoulder is a condition where the shoulder gradually becomes stiff, painful and harder to move. Many people first notice a dull ache or difficulty lifting the arm, and over time simple tasks like reaching overhead, fastening clothes or carrying items become more challenging. 

Because the symptoms develop slowly, early changes are easy to miss. Having a clearer picture of how frozen shoulder develops can help you recognise symptoms earlier and seek timely care in Singapore.

Symptoms of Frozen Shoulder

Frozen shoulder symptoms tend to appear slowly and may vary from person to person. The condition typically involves both pain and stiffness, and these symptoms often change over time. Common symptoms include:

Pain in the shoulder

A dull, aching pain is often felt deep in the shoulder. It may worsen with certain arm movements or during the night, especially when lying on the affected side.

Stiffness and reduced range of motion

People often find it difficult to lift the arm, rotate it outward or reach behind the back. Movements that were once simple, such as putting on a shirt, can become challenging.

Difficulty with daily activities

Tasks such as brushing hair, reaching into cupboards or carrying bags can become harder as the stiffness increases.

What Happens at Each Stage of Frozen Shoulder?

Frozen shoulder progresses through distinct stages. Each stage presents different symptoms and can last for several weeks or months. The three stages are:

Freezing stage

The shoulder becomes increasingly painful, and movement gradually decreases. Pain may be felt during movement as well as at rest. This is usually the most uncomfortable stage.

Frozen stage

Pain often reduces, but stiffness becomes more noticeable. The shoulder may feel “stuck,” making it difficult to perform overhead or behind-the-back movements.

Thawing stage

Movement slowly improves as the inflammation settles. Daily activities gradually become easier, although full recovery can still take time.

The entire process may take many months to complete, and recovery durations vary among individuals.

What Causes Frozen Shoulder?

Frozen shoulder develops when the capsule surrounding the shoulder joint thickens and tightens. The exact reason this happens is not always clear, but several factors can increase the risk. These include:

Previous shoulder injury or surgery

A period of reduced movement after an injury or procedure can lead to stiffness and inflammation.

Prolonged immobility

Keeping the shoulder still for long periods, such as after a fracture or due to pain from another condition, may contribute to frozen shoulder.

Medical conditions

People with diabetes, thyroid disorders or certain chronic illnesses have a higher risk of developing frozen shoulder.

Age and gender

Frozen shoulder most commonly affects adults between the ages of 40 and 60, and it tends to occur slightly more often in women.

Diagnosis of Frozen Shoulder

Frozen shoulder is usually diagnosed through a combination of medical history, a physical examination and imaging tests if needed. Doctors typically assess the following:

Shoulder movement

Your doctor will check how far you can lift, rotate or move your arm. Restricted motion in several directions is a key sign of frozen shoulder.

Pain pattern

Information about when the pain occurs and which movements trigger symptoms helps guide the diagnosis.

Imaging tests

X-rays are often used to rule out arthritis or other joint problems. In some cases, an ultrasound or MRI may be recommended to check for inflammation or other shoulder conditions.

Ways to Improve Shoulder Stiffness and Pain

Most people recover from frozen shoulder without surgery, although improvement takes time. Treatment focuses on reducing pain, improving movement and restoring shoulder function. Common management options include:

Pain relief

Short-term use of medication may help reduce discomfort, especially during the early stages when pain is more intense.

Physiotherapy

Gentle, progressive exercises help improve movement and reduce stiffness. A physiotherapist can guide stretching and strengthening routines suited to each stage of recovery.

Heat therapy or cold packs

Applying heat before stretching can help loosen the shoulder. Cold packs may be useful after exercises to reduce irritation.

Hydrodilatation

This procedure involves injecting fluid into the joint to help stretch the tightened capsule. It may improve movement in selected cases.

Injections

A corticosteroid injection may reduce inflammation and pain during the early stages.

Surgery

Surgery is rarely needed. It may be considered if symptoms do not improve after several months of non-surgical treatment.

Frequently Asked Questions

• How do I know if I have frozen shoulder or another shoulder problem?

Pain combined with a significant loss of movement in several directions is a key sign. If simple movements like reaching overhead or behind your back become difficult, frozen shoulder may be the cause.

• Does frozen shoulder get better on its own?

Yes, many people recover over time, but the process can take many months. Treatment can help reduce pain and improve movement more quickly.

• Can I still use my arm if I have frozen shoulder?

Yes, gentle movement is encouraged. However, pushing through sharp or intense pain may worsen symptoms.

• Is frozen shoulder linked to diabetes?

People with diabetes have a higher risk of developing frozen shoulder. The reason is not fully understood, but stiffness and inflammation are more common in individuals with long-term diabetes.

• Is frozen shoulder the same as a rotator cuff injury?

No. Frozen shoulder mainly causes stiffness and limited movement, while rotator cuff injuries involve tendon strain or tears that affect strength. A clinical assessment helps tell the difference because symptoms can feel similar.

Frozen Shoulder: What to Remember

Frozen shoulder tends to develop gradually, leading to increasing stiffness and difficulty with everyday movements. The condition progresses through stages, and treatment usually focuses on easing pain, improving movement and supporting recovery over time. An early assessment can help identify what stage you are in and guide appropriate care.

If your symptoms are affecting daily activities, our orthopaedic team at Pinnacle Orthopaedic Group in Singapore is available to assess your shoulder and discuss suitable treatment options.