Frozen shoulder, or adhesive capsulitis, is a condition where the shoulder joint becomes stiff, painful and progressively restricted in movement. It occurs when the capsule surrounding the shoulder joint thickens and tightens, forming adhesions that limit motion.

The condition typically develops gradually over months and can severely affect daily activities, such as reaching overhead, dressing or even hair combing. Without timely treatment, stiffness may persist for years and lead to long-term loss of shoulder mobility.

What causes Frozen Shoulder?

The condition develops when the capsule surrounding the shoulder joint thickens, contracts and forms scar-like adhesions, restricting normal movement. This tightening can occur for several reasons, such as:

• Abnormal tissue – in some individuals, the body’s healing response becomes exaggerated, producing excessive scar tissue that binds joint structures together.

• Inflammation with the joint capsule – irritation of the inner lining of the shoulder capsule triggers swelling and pain, which leads to the gradual build-up fibrous tissue.
• Prolonged shoulder immobility – when the arm is kept still for extended periods after an injury, surgery or illness, the capsule can stiffen and lose flexibility.

• Reduced synovial fluid production – limited lubrication within the joint decreases smooth motion, further contributing to stiffness.

• Secondary inflammation from nearby injury – damage to the surrounding tendons, such as in rotator cuff tear, can spread inflammation into the capsule, setting off the freezing process.

What are the stages of Frozen Shoulder?

Frozen shoulder develops gradually and typically progresses through 3 overlapping stages. Each stage has distinct characteristics and durations:

• Freezing stage (painful phase) – shoulder pain begins gradually, often worsening at night or during movement. The range of motion becomes increasingly limited as inflammation within the capsule intensifies. This stage can last several weeks to months.

• Frozen stage (stiffness phase) – pain may lessen, but the shoulder becomes significantly stiffer. Simple tasks like combing hair, reaching behind the back or fastening clothing can feel nearly impossible. Muscle weakness may also develop due to reduced use.

• Thawing stage (recovery phase) – movement slowly returns as the capsule loosens and inflammation subsides. Full recovery can take several months, though some stiffness may persist for a longer period.

Who is at risk of developing Frozen Shoulder?

Despite the fact that frozen shoulders can affect anyone, there are certain factors that make a person more prone to developing the condition. This is especially true when it is combined with limited movement or prior injury.

Some of the factors are:

• Age – frozen shoulder most often affects adults between 40 and 60 years old. As we age, the shoulder capsule becomes less elastic, making it more vulnerable to tightening and stiffness.

• Gender – women are more likely than men to develop frozen shoulders, possibly due to hormonal factors and a higher incidence of autoimmune or thyroid conditions.

• Autoimmune and inflammatory disease – disorders such as rheumatoid arthritis or LUPUS can cause chronic inflammation, affecting the capsule’s mobility.

• Metabolic disorders – diabetes and thyroid disease increase the risk significantly, as they can alter tissue metabolism and reduce joint mobility.

• Cardiovascular and neurological problems – stroke, Parkinson’s disease or post-heart surgery mobility may indirectly trigger frozen shoulder due to reduced arm use.

• Prolonged shoulder immobilisation – wearing a sling or avoiding movement after surgery, fractures or pain can cause the shoulder capsule to contract and stiffen.

• Previous shoulder conditions – past rotator cuff injuries, tendinitis or bursitis may lead to secondary stiffness if the shoulder is not mobilised during recovery.

• Sedentary lifestyle – limited upper body movement or even sustained slouching over time reduces shoulder range and promotes tightness.

What are the possible complications if treatment is delayed?

When frozen shoulder is not treated promptly or managed properly, several complications can occur. This includes, but is not limited to:

• Altered biomechanics – to compensate for restricted motion, patients may overuse the neck, back or opposite shoulder, which can result in secondary strain or pain in those areas.

• Functional limitation – in severe or prolonged cases, patients may never regain full range of motion, affecting work performance, sleep and the ability to perform daily tasks.

• Increased risk of re-injury – once motion is lost and strength declines, even mild trauma or overexertion can trigger inflammation and recurrence.

• Muscle weakness – limited movement causes the surrounding muscles, especially the rotator cuff and deltoid, to weaken over time. This makes everyday activities more difficult and slows rehabilitation.

• Prolonged stiffness and pain – without early intervention, the shoulder capsule may remain thickened and tight for years, leading to persistent discomfort and reduced quality of life.

How is Frozen Shoulder diagnosed in Singapore?

Because frozen shoulders can mimic other shoulder conditions, an accurate diagnosis is key to ensuring the right treatment plan. The assessment focuses on understanding how much the shoulder has stiffened and identifying the underlying factors that may have contributed to it.

Dr James Tan will use a combination of diagnostic procedures to reach an accurate diagnosis, which entails:

• Medical history – Dr James Tan will discuss your symptoms, how they began and any associated health issues such as diabetes or thyroid disease. This helps determine whether stiffness developed gradually or followed an injury or period or immobility.

• Physical examination – the shoulder’s movement is carefully assessed. In frozen shoulder, both self-initiated and assisted movements are restricted, distinguishing it from conditions like rotator cuff injury. 

• Imaging – x-rays can help exclude arthritis or bone spurs, while magnetic resonance imaging (MRI) or ultrasound may be used to evaluate soft tissues and ensure no tendon tears or inflammation are present.

How is Frozen Shoulder treated in Singapore?

The treatment for frozen shoulder focuses on reducing pain, restoring range of motion and preventing recurrence. However, the approach depends on the stage of stiffness and the severity of symptoms. As such, Dr James Tan may tailor a standalone treatment plan or a combination of multiple treatments, such as:

Conservative Treatments

• Medication – anti-inflammatory drugs help relieve pain and reduce inflammation, making stretching exercise more tolerable.

• Corticosteroid injections – targeted injections can quickly reduce pain and inflammation, allowing more effective participation in physiotherapy.

• Heat therapy and cold compresses – applying warmth before exercise helps loosen the joint, while ice packs after therapy can reduce swelling and discomfort. 

• Physiotherapy – guided stretching and mobilization exercises form the cornerstone of treatment. Regular sessions restore joint mobility while preventing further tightening of the shoulder capsule.

Non-surgical Treatments

• Platelet-rich-plasma (PRP) therapy – PRP can support healing by stimulating tissue repair and reducing inflammation, particularly in cases with associated tendon irritation.

• Hydrodilation – this involves injecting sterile fluid into the joint capsule to stretch it and restore mobility. It is a minimally invasive procedure performed under image guidance.

Surgical Treatments

• Arthroscopic capsular release – using minimally invasive techniques, tight portions of the capsule are surgically released to restore motion.

• Manipulation under anaesthesia – the shoulder is gently moved through its full range while the patient is under anaesthesia, helping to break adhesions in the joint capsule.

Recovery and Post-Treatment Care

Recovery varies depending on the stage of the frozen shoulder and the treatment approach. Gentle, guided physiotherapy combined with pain management helps restore mobility, while avoiding activities that strain the shoulder prevents further tightening. Regular follow-up allows progress to be monitored and exercises adjusted, enabling most patients to regain functional movement and return to daily activities safely.

Book an Appointment

Frozen shoulder is a common condition that can significantly impact daily activities if it is left untreated. Early intervention, proper diagnosis and a structured treatment plan are essential to restore mobility and reduce pain. With consistent care, most patients gradually regain function and return to their normal routines.

If you are experiencing shoulder stiffness, limited movement or persistent discomfort, do not wait to seek help. Schedule an appointment with Dr James Tan and explore personalised treatment options that can help you regain freedom of movement.