Condition Guide · Brighton & Hove
Frozen shoulder is one of the most painful and disruptive shoulder conditions. Understanding which stage you're in determines what treatment will and won't help.
Understanding the Condition
Frozen shoulder, medically known as adhesive capsulitis, is a condition characterised by progressive inflammation and thickening of the shoulder joint capsule, leading to significant pain and severe restriction of both active and passive range of motion. Unlike most shoulder conditions where pain limits movement, in frozen shoulder the capsule itself physically restricts it.
It affects approximately 2-5% of the general population, is significantly more common in women, and has a strong association with diabetes, thyroid disorders, cardiovascular disease and previous shoulder injury or surgery. The majority of cases are idiopathic, occurring without obvious cause.
What distinguishes frozen shoulder from other shoulder conditions is restriction of passive range of motion, particularly external rotation. If someone else moves your arm and it is significantly restricted regardless of pain, frozen shoulder is the likely diagnosis. Most other shoulder conditions restrict active movement through pain but preserve passive range. This distinction is clinically critical.
Type 1 and Type 2 diabetes are the strongest risk factors, with diabetic patients having a 10-20% lifetime risk of frozen shoulder compared to 2-5% in the general population. Thyroid disorders, Dupuytren's contracture and Parkinson's disease also increase risk. Immobilisation following injury or surgery is a well-recognised precipitating factor, which is why early movement after shoulder procedures is now standard practice.
Around 20-30% of patients develop frozen shoulder in the opposite shoulder within 5 years of the first episode. The second episode is typically less severe. If you have had frozen shoulder on one side, it is worth being aware of early symptoms on the other side and seeking assessment promptly if they develop.
The Three Stages
Frozen shoulder progresses through three recognised stages. Treatment approach differs significantly depending on which stage is present, which is why staging is the essential first step in management.
The most painful stage. Significant inflammation in the joint capsule produces severe pain, often worse at night and at rest. Range of motion begins to reduce. Pain is typically out of proportion to the restriction at this stage. Anti-inflammatory approaches and pain management are the priority. Aggressive stretching at this stage can significantly worsen the condition.
Pain begins to reduce but stiffness becomes the dominant feature. The capsule is now significantly thickened and contracted, producing severe restriction in all planes of movement. This is the stage where patients often feel they have plateaued. Gentle mobilisation and capsular stretching become the primary focus.
Gradual, spontaneous recovery of range of motion. Pain has typically reduced significantly. Progressive active and passive mobilisation combined with strengthening of the surrounding musculature supports recovery. Most patients regain functional range though full anatomical range may not return in all cases.
The natural history of frozen shoulder is 1-3 years from onset to resolution. This is not a reason for pessimism — appropriate treatment significantly reduces pain during the freezing stage, maintains as much movement as possible during the frozen stage, and accelerates recovery during thawing. Most patients recover well with conservative management though a minority require surgical intervention.
Treatment Approach
Treatment that is appropriate in one stage can be harmful in another. Accurate staging determines the approach.
Accurate identification of the current stage through range of motion testing, pain pattern assessment and history, before any treatment begins.
Gentle soft tissue work to surrounding musculature, pain education and activity modification during the inflammatory stage. Aggressive treatment at this stage worsens outcomes.
Specific glenohumeral mobilisation techniques targeting capsular restriction, applied progressively as the inflammatory phase resolves.
Structured progressive stretching of the contracted capsule, particularly targeting external rotation and posterior capsule tightness.
Targeted needling to the rotator cuff and periscapular musculature that becomes significantly guarded and weakened during the frozen stage.
Progressive rotator cuff and scapular stabiliser strengthening as range of motion returns, restoring full functional strength alongside mobility.
Early accurate staging and appropriate management significantly reduces the pain and duration of frozen shoulder. Don't wait for it to resolve on its own.