Frozen shoulder, also known as adhesive capsulitis, is one of the most difficult shoulder conditions to manage. Patients present unable to reach overhead, sleep on their side, or fasten a seatbelt without pain. The good news is that frozen shoulder is completely treatable, and most patients recover fully without surgery. This article walks through what frozen shoulder actually is, the four stages of the condition, what causes it, and how Dr. Burnham and the team at Ochsner-Andrews Sports Medicine Institute in Baton Rouge approach treatment.
If you have been dealing with progressive shoulder stiffness and pain, especially pain that wakes you up at night, you may be in the early stages of frozen shoulder. Understanding the condition is the first step toward getting better.
In This Article
What Is Frozen Shoulder?
Frozen shoulder is a condition characterized by progressive pain and stiffness in the shoulder joint caused by inflammation and contracture of the shoulder capsule. The capsule is the connective tissue envelope surrounding the shoulder joint. In frozen shoulder, this capsule becomes inflamed, thickened, and scarred, which restricts the normal range of motion that the joint relies on to function.
The condition was first described by Ernest Codman in 1934, who called it “frozen shoulder” because of the way motion became locked. The term adhesive capsulitis, introduced by Neviaser in 1945, reflects the underlying pathology more precisely: adhesions form within the joint capsule and the capsule contracts down around the humeral head. Both terms refer to the same condition.
Frozen shoulder affects approximately 2 to 5 percent of the general population and is more common in women, in people between the ages of 40 and 60, and in individuals with diabetes. People with diabetes have a significantly higher risk, with some studies reporting rates of frozen shoulder as high as 20 percent in the diabetic population.
The 4 Stages of Frozen Shoulder (Neviaser Classification)
Dr. Burnham uses the Neviaser classification, which accounts for both the clinical presentation and what is observed arthroscopically inside the joint. Understanding which stage a patient is in guides the appropriate treatment intensity and surgical decision-making.
Stage 1 (Pre-adhesive): Pain begins, often at night. Range of motion is mildly restricted or near normal. Arthroscopically, the synovial lining is inflamed but no adhesions have formed yet. This stage typically lasts 3 to 9 months.
Stage 2 (Acute Adhesive Synovitis): Pain peaks and stiffness increases significantly. The synovium is thickened and inflamed, and early adhesions begin to form in the axillary recess. This is often the most painful stage. Duration: 3 to 9 months.
Stage 3 (Maturation): Pain begins to lessen but stiffness is at its worst. Adhesions are mature and dense. The axillary recess is obliterated. Patients in this stage often notice that the pain has improved but they still cannot raise their arm. Duration: 9 to 14 months.
Stage 4 (Chronic/Resolution): Gradual return of motion begins. Pain is minimal. Some patients recover full motion spontaneously; others are left with a permanent partial loss. Duration: 12 to 24 months from onset if untreated.
The total natural history of untreated frozen shoulder spans 1 to 3 years. With early, appropriate treatment, most patients recover significantly faster.
Symptoms of Frozen Shoulder
The hallmark symptom of frozen shoulder is a progressive, painful loss of shoulder motion that affects both active movement (what the patient can do) and passive movement (what the examiner can move for the patient). This global restriction of passive motion is what distinguishes frozen shoulder from other common shoulder conditions such as rotator cuff tears, where passive motion is typically preserved.
- Pain deep in the shoulder, often worse at night and with reaching
- Inability to reach overhead or behind the back
- Difficulty with daily activities such as fastening a seatbelt, putting on a jacket, or reaching a high shelf
- Stiffness that worsens gradually over weeks to months
- A dull aching pain at rest that becomes sharp with attempted movement at the end range of motion
- Sleep disruption due to shoulder pain, especially when rolling onto the affected side
Causes and Risk Factors
The exact cause of frozen shoulder is not fully understood, but the underlying process involves synovial inflammation followed by capsular fibrosis. Inflammatory cytokines drive the formation of scar tissue within the joint capsule, which progressively restricts motion.
Several factors significantly increase the risk of developing frozen shoulder:
- Diabetes mellitus is the single strongest risk factor. Diabetic frozen shoulder tends to be more severe and more resistant to treatment than idiopathic cases.
- Prolonged immobilization after an injury, fracture, or surgery can trigger the inflammatory cascade that leads to capsular contracture.
- Thyroid disorders, both hypothyroidism and hyperthyroidism, are associated with an increased incidence.
- Cardiovascular disease and stroke are associated, particularly when a stroke leads to prolonged immobility of the affected limb.
- Female sex and age 40 to 60 represent the highest-incidence demographic.
- Prior frozen shoulder in the contralateral shoulder increases the likelihood of developing the condition in the opposite shoulder.
How Frozen Shoulder Is Diagnosed
Frozen shoulder is primarily a clinical diagnosis. Dr. Burnham assesses the patient’s history carefully, focusing on the onset and progression of symptoms, any prior shoulder injury or surgery, and comorbidities such as diabetes or thyroid disease. The physical examination centers on measuring active and passive range of motion in all shoulder planes.
The diagnostic findings that support frozen shoulder include global restriction of passive motion (loss of external rotation is typically the earliest and most consistent finding), pain at the end range of motion in all directions, and a history consistent with the progressive stages described above.
Standard X-rays are obtained to rule out other causes of shoulder pain and stiffness, including glenohumeral arthritis, calcific tendinitis, and fracture malunion. An MRI is generally not required to diagnose frozen shoulder, but it may be ordered when the clinical picture is unclear or when a concurrent rotator cuff tear needs to be ruled out. In true frozen shoulder, the MRI characteristically shows thickening of the inferior capsule and the coracohumeral ligament.
Treatment for Frozen Shoulder
The vast majority of patients with frozen shoulder do not require surgery. Treatment is staged to match where the patient falls in the natural history of the condition.
Physical therapy and stretching form the cornerstone of treatment. The five specific regions of the capsule that must be mobilized are the anteroinferior, anterosuperior, posteroinferior, posterosuperior, and axillary pouch regions. Directed physical therapy with a therapist experienced in shoulder rehabilitation produces significantly better outcomes than home exercise alone.
Corticosteroid injection into the glenohumeral joint reduces the synovial inflammation that drives progression of the disease, particularly in Stages 1 and 2. An intra-articular corticosteroid injection, when combined with physical therapy, accelerates the resolution of symptoms and reduces the total duration of the condition. Multiple studies have confirmed that early injection combined with PT produces better outcomes than PT alone, particularly in the first 6 weeks of treatment.
NSAIDs (non-steroidal anti-inflammatory medications) help manage pain and inflammation and are frequently used alongside injection and therapy, particularly in the early inflammatory stages.
Hydrodilatation (distension arthrography) is a technique in which fluid is injected under pressure into the shoulder joint to stretch and rupture the contracted capsule. It can be performed with or without a steroid component. Some patients experience significant improvement after this procedure, though results are variable and most evidence suggests outcomes are similar to corticosteroid injection plus PT.
When Surgery Is Needed
When 3 to 6 months of appropriate conservative treatment fail to produce adequate improvement, surgery may be indicated. The standard surgical procedure for refractory frozen shoulder is arthroscopic capsular release, sometimes combined with manipulation under anesthesia (MUA).
During arthroscopic capsular release, Dr. Burnham carefully releases the contracted portions of the shoulder capsule using a small arthroscopic probe inserted through tiny incisions. The release targets the anterior, inferior, and posterior capsule as needed, restoring the volume and compliance of the joint. When inflammation of the synovium is present, it is addressed at the same time. The procedure is performed under general anesthesia and typically takes less than an hour.
Outcomes after arthroscopic capsular release are excellent. The large majority of patients regain full or near-full range of motion and report substantial improvement in pain and function. Physical therapy begins within days of surgery to maintain the motion gained intraoperatively and to strengthen the surrounding musculature.
If you have been told you have frozen shoulder, or if you have progressive shoulder stiffness that is interfering with daily life, Dr. Burnham and the team at Ochsner-Andrews Sports Medicine Institute are available to help. Early evaluation leads to earlier treatment, a shorter overall course, and the best chance of a complete recovery. Contact the office to schedule an evaluation at Ochsner-Andrews Sports Medicine Institute.
Frequently Asked Questions About Frozen Shoulder
How long does frozen shoulder take to heal on its own?
Without treatment, frozen shoulder can take 1 to 3 years to fully resolve, and some patients never regain complete range of motion. With early treatment combining a corticosteroid injection and physical therapy, most patients see significant improvement within 3 to 6 months. The sooner treatment begins, the shorter the overall recovery timeline.
What is the difference between frozen shoulder and a rotator cuff tear?
The key distinguishing feature is passive range of motion. In frozen shoulder, the shoulder is stiff in all directions even when the examiner moves it (passive motion is restricted). In a rotator cuff tear, the shoulder may be painful and weak, but passive range of motion is typically preserved. An MRI can confirm the diagnosis when the clinical picture is unclear.
Can frozen shoulder come back after it has been treated?
Recurrence in the same shoulder is uncommon after complete resolution. However, approximately 17 percent of patients who develop frozen shoulder in one shoulder will develop it in the opposite shoulder at some point, typically within 5 years. This is especially true in patients with diabetes. The second episode tends to follow a similar course and respond to the same treatments.
Should I push through the pain and keep moving my shoulder with frozen shoulder?
In the early inflammatory stages (Stage 1 and Stage 2), aggressive stretching can worsen inflammation and increase pain. Gentle range-of-motion exercises are appropriate, but forceful stretching during active inflammation is counterproductive. In the frozen and thawing stages (Stage 3 and Stage 4), progressive stretching becomes the cornerstone of treatment. A physical therapist experienced with frozen shoulder can guide the right level of effort at each stage.
Is frozen shoulder the same as adhesive capsulitis?
Yes, frozen shoulder and adhesive capsulitis are two names for the same condition. Adhesive capsulitis is the clinical term used in medical literature, referring to the formation of adhesions (scar tissue) within the shoulder capsule. Frozen shoulder is the common term patients and clinicians use to describe the same process of capsular inflammation, thickening, and progressive loss of motion.