What Is Frozen Shoulder?
Understanding why the shoulder freezes is the first step toward effective treatment.
Frozen shoulder — medically known as adhesive capsulitis — is a condition in which the capsule of connective tissue surrounding the shoulder joint becomes inflamed, thickened, and contracted. This causes the joint space to shrink, adhesions to form, and the shoulder to lose its range of motion progressively. The hallmarks are deep, aching shoulder pain and an increasingly limited ability to raise, rotate, or reach with the arm.
The condition follows a characteristic pattern of three overlapping stages: a freezing phase (pain dominates, movement begins to decline), a frozen phase (pain may ease slightly, but stiffness reaches its peak), and a thawing phase (mobility gradually returns). Left untreated, this cycle typically lasts one to three years. With physiotherapy, the process is significantly accelerated — and the stiffness and pain that develop during the frozen phase can be substantially reduced.
The cause in most cases is unknown — this is called primary frozen shoulder. Secondary frozen shoulder occurs following a trigger such as a shoulder injury, surgery, rotator cuff tear, or prolonged immobilisation. Diabetes dramatically increases both the risk and the severity of the condition, affecting up to 20% of people with diabetes at some point in their lives.
Quick Facts
The Three Phases of Frozen Shoulder
Understanding which phase you are in guides how we treat you.
Freezing
Duration: 6 weeks – 9 months
Pain is the dominant symptom — deep, aching, often severe at night and with movement. Range of motion begins to decline. This is the most painful stage and often the most distressing because the cause is not obvious at first.
Frozen
Duration: 4 – 12 months
Pain may reduce slightly, but stiffness reaches its peak. Daily tasks — reaching overhead, dressing, driving — become difficult or impossible. The shoulder feels locked, and forced movement causes sharp pain.
Thawing
Duration: 5 – 24 months
Mobility gradually returns as the capsule softens. With physiotherapy, this process is significantly faster and more complete. Most patients achieve a full or near-full return of movement and a pain-free shoulder.
Common Causes & Risk Factors
Primary frozen shoulder has no clear cause, but several factors significantly increase the risk. Secondary cases are linked to identifiable triggers.
Diabetes
The strongest known risk factor. Diabetics are 3–4 times more likely to develop frozen shoulder, often in both shoulders sequentially, and tend to have more severe, prolonged cases.
Shoulder Immobilisation
Prolonged inactivity of the shoulder — after a sling, surgery, or injury — allows the capsule to tighten around a joint that is not being regularly moved through its full range.
Shoulder Surgery
Operations on the rotator cuff, labrum, or shoulder joint can trigger post-surgical adhesive capsulitis — particularly when early mobilisation is delayed or inadequate.
Age & Hormonal Changes
Most cases occur between 40 and 60. Women, particularly during perimenopause, face higher risk — suggesting hormonal factors influence capsule inflammation.
Cardiac & Thyroid Conditions
Cardiovascular disease, thyroid disorders, and Parkinson's disease are all associated with increased frozen shoulder risk, possibly through altered tissue healing and inflammation.
Rotator Cuff Injury
An unresolved rotator cuff tear or tendinopathy that causes the patient to guard and under-use the shoulder can lead to secondary frozen shoulder over several months.
Stroke & Neurological Conditions
Reduced movement and altered muscle tone following stroke frequently leads to frozen shoulder on the affected side — making early physiotherapy after stroke especially important.
Idiopathic (No Clear Cause)
In many patients — particularly primary frozen shoulder — no triggering event can be identified. The capsule simply becomes inflamed and begins to contract for reasons that are not yet fully understood.
Symptoms to Watch For
Frozen shoulder has a distinctive symptom pattern. These are the signs our therapists assess carefully — including which phase you are in.
Night Pain
Deep, aching shoulder pain that worsens at night — particularly when lying on the affected side — is one of the most characteristic early signs and significantly disrupts sleep.
Loss of Overhead Reach
Inability or significant difficulty raising the arm above shoulder height — reaching a shelf, hanging washing, or lifting — is the most common functional limitation reported.
Restricted Internal Rotation
Difficulty reaching behind the back — fastening a bra, tucking in a shirt, or reaching into a back pocket — reflects loss of internal rotation, typically one of the first movements affected.
Difficulty Dressing
Getting dressed — particularly putting on or removing a shirt, jacket, or bra — becomes painful and restricted. This daily functional loss is one of the main motivations patients seek treatment.
Pain When Driving
Reaching across the body to use a seatbelt, adjust a mirror, or turn the steering wheel causes sharp pain — a sign of restricted external rotation and adduction range.
Sharp Pain at End Range
Any movement pushed to its limit — whether by the patient or another person — produces a sharp, catching pain. This end-range pain distinguishes frozen shoulder from simple rotator cuff problems.
How Physiotherapy Helps
Physiotherapy is the most effective non-surgical treatment for frozen shoulder — reducing pain, restoring movement, and shortening the overall recovery timeline.
Our Results
Most frozen shoulder patients begin to notice improved range and reduced pain within 4–6 sessions at Premium Care.
- Night pain significantly reduced
- Overhead reach progressively restored
- Dressing and daily tasks recovered
- Recovery timeline significantly shortened
- Surgery avoided in the vast majority
Full Shoulder & Phase Assessment
We measure your active and passive range in all planes, assess capsule tightness, identify which phase of frozen shoulder you are in, and screen for contributing factors such as diabetes or rotator cuff involvement. Your phase determines how aggressively we can mobilise — getting this right from the start prevents unnecessary pain and setbacks.
Pain Management & Inflammation Control
In the freezing phase, our first priority is reducing pain to a manageable level. We use therapeutic ultrasound, TENS, and gentle manual techniques around the joint to reduce inflammation, ease muscle guarding, and allow sleep to improve. Getting pain under control is what makes subsequent mobilisation possible.
Capsular Mobilisation & Stretching
Once pain allows, we apply targeted joint mobilisation techniques — Maitland Grade III–IV oscillations, posterior capsule stretching, and inferior glide techniques — to progressively restore the joint's range of motion. Each session aims to extend the available range a little further. This is the core of frozen shoulder treatment and requires precision and patience.
Home Exercise Programme & Maintenance
We teach you a structured set of pendulum, overhead, and rotation exercises to perform daily between sessions. These maintain the range we gain in clinic and prevent the capsule from tightening back. A good home programme is what separates patients who steadily improve from those who plateau between sessions.
Techniques We Use
We select techniques based on your phase and your specific pattern of restriction — never a one-size-fits-all protocol.
Joint Mobilisation (Maitland)
Graded oscillatory mobilisation of the glenohumeral joint — from gentle Grade I techniques in acute pain through progressive Grade III–IV techniques to stretch the contracted capsule. The most important hands-on technique for restoring frozen shoulder range.
Manual TherapyTherapeutic Ultrasound
Deep thermal and mechanical effects penetrate the shoulder capsule and surrounding soft tissue, reducing inflammation, improving tissue extensibility, and preparing the joint for mobilisation. Particularly effective in the early and mid-stages of frozen shoulder.
ElectrotherapyTENS & Interferential Therapy
Electrical stimulation modalities that reduce pain signals from the shoulder joint and surrounding musculature, making it possible to tolerate both manual therapy and home exercises with less discomfort — particularly important for night pain management.
ElectrotherapyProgressive Range Exercises
A structured home exercise programme of pendulum swings, wall walks, towel stretches, and pulleys is taught and progressively upgraded as range improves. Consistency with home exercises is one of the strongest predictors of a faster, more complete recovery.
Exercise LibraryRecovery Timeline
With physiotherapy, most patients progress significantly faster than the condition's natural course. This is the typical progression we see at Premium Care.
wks
Pain Control
Night pain improves. Muscle guarding reduces. Sleep becomes more comfortable.
wks
Range Returning
Overhead reach improves. Dressing gets easier. Daily tasks resume.
wks
Full Mobilisation
Rotations restore. Capsule stretching progresses. Strength rebuilds.
Full Recovery
Full or near-full range. Pain-free. Independent home programme.
Home Exercises to Start
These gentle exercises are safe to begin at home during the early stages. Your therapist will prescribe and progress these individually based on your phase.
Pendulum Swings
Lean forward, let the affected arm hang freely, and use gentle body momentum to swing the arm in small circles. Uses gravity to gently distract the joint and encourage capsule relaxation without active muscle effort — safe even in the freezing phase.
Wall Walk (Finger Walk)
Stand facing a wall and walk your fingers upward as high as comfortable, hold briefly, and slowly lower. Marks your maximum comfortable height each session and progressively challenges overhead range. One of the most effective functional exercises for frozen shoulder recovery.
Towel Internal Rotation Stretch
Hold a towel behind your back with the unaffected arm above, affected arm below. Gently pull upward with the unaffected arm to stretch the affected shoulder into internal rotation. Targets the posterior capsule — often the tightest structure in frozen shoulder — with controlled, progressive stretch.
Cross-Body Stretch
Bring the affected arm across the body at shoulder height and use the other arm to gently increase the stretch. Targets the posterior capsule and improves horizontal adduction — the movement restricted when reaching across to use a seatbelt or hug someone.
Seek Urgent Assessment If You Have These Symptoms
Most frozen shoulder is benign, but these signs require immediate medical attention to rule out serious causes.
If in doubt, contact us and we will advise you on whether you need emergency care or a physiotherapy assessment.
Ready to Treat Your Frozen Shoulder?
Every week of a frozen shoulder untreated is another week of the capsule tightening further. Early physiotherapy consistently produces faster, more complete recoveries. Our certified therapists will assess which phase you are in, identify the exact pattern of restriction, and build a treatment plan designed to restore your shoulder as efficiently as possible. Evening appointments are available every day except Sunday.