Frozen Shoulder (Adhesive Capsulitis): Symptoms, Causes & Treatment — Complete Guide

Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026

Quick Answer

Frozen shoulder, or adhesive capsulitis, is pain and stiffness that develops when the connective tissue capsule around the shoulder joint thickens and tightens. It progresses through freezing, frozen and thawing stages and typically improves on its own within 1 to 3 years. It most often affects adults 40 and older. Treatment focuses on pain control and range-of-motion exercises.

What the research says

• An early steroid injection plus home exercises gave the best results. A systematic review and network meta-analysis of 65 randomized studies (4,097 participants) found that only injecting a corticosteroid into the joint was clearly better than other treatments in the short term for pain (about 1.0 point lower on a 10-point scale than no treatment or placebo, 95% CI −1.5 to −0.5) and function; adding a home exercise program and physiotherapy brought extra benefit at 3–12 months, and the authors recommended early injection (for frozen shoulder of less than 1 year) together with home exercises. (Challoumas et al., JAMA Netw Open, 2020) [3]

• Diabetes roughly triples the odds of frozen shoulder. A systematic review and meta-analysis of six case-control studies (5,388 people) found that people with diabetes had 3.69 times the odds of developing frozen shoulder (95% CI 2.99–4.56); two cohort studies pointed the same way (hazard ratios 1.32 and 1.67), although the authors noted most studies had a high risk of bias. (Dyer et al., BMJ Open, 2023) [4]

Frozen Shoulder at a Glance

At a Glance	Details
Medical name	Adhesive capsulitis
What happens	The connective tissue capsule enclosing the shoulder joint thickens and tightens
Core symptoms	Stiffness and pain; three slow-moving stages; pain may worsen at night
Typical recovery	Within 1 to 3 years
Who is at risk	Adults 40+, especially women; people with diabetes, thyroid or heart disease, Parkinson's; immobilized shoulders
Cause	Unclear why it starts; strongly linked to prolonged shoulder immobilization
Diagnosis	Usually by symptoms alone; physical exam checks active and passive range of motion; imaging rules out other conditions
Treatment	Range-of-motion exercises, pain relievers, steroid injections, hydrodilatation, manipulation under anesthesia, or rarely surgery

Note: This article is for general information only and is not a substitute for professional medical advice. Always consult a qualified healthcare professional for diagnosis and treatment.

What Is Frozen Shoulder?

Frozen shoulder, also called adhesive capsulitis, involves stiffness and pain in the shoulder joint. It occurs when the connective tissue enclosing the joint thickens and tightens. Symptoms typically begin slowly, then get worse — and then, over time, get better, usually within 1 to 3 years.

The key risk insight: having to keep a shoulder still for a long period increases the risk of developing frozen shoulder. This might happen after surgery or after breaking an arm. Treatment typically involves range-of-motion exercises, and sometimes corticosteroids and numbing medicines injected into the joint. Rarely, surgery is needed to loosen the connective tissue so the shoulder can move more freely.

Frozen Shoulder Symptoms: The Three Stages

Frozen shoulder typically develops slowly in three stages — each with its own duration and character:

Stage	What Happens	Typical Duration
Freezing	Any movement of the shoulder causes pain, and your ability to move the shoulder becomes limited	2 to 9 months
Frozen	Pain may lessen, but the shoulder becomes stiffer and using it becomes harder	4 to 12 months
Thawing	Your ability to move the shoulder begins to improve	5 to 24 months

One practical detail worth knowing: for some people, the pain worsens at night, sometimes disrupting sleep. That alone can be enough to raise the question of frozen shoulder.

What Causes Frozen Shoulder?

The shoulder joint is enclosed in a capsule of connective tissue. Frozen shoulder occurs when this capsule thickens and tightens around the shoulder joint, restricting its movement.

It's unclear why this happens to some people. But it's more likely to happen after keeping a shoulder still for a long period, such as after surgery or an arm fracture. The immobilization itself appears to trigger the tightening process.

Risk Factors: Who Gets Frozen Shoulder?

Certain factors increase the risk of developing frozen shoulder. It is more common in people who have diabetes, heart disease, or thyroid conditions, and Parkinson's disease may also raise the risk.

Risk Factor	Details
Age and sex	People 40 and older, particularly women, are more likely to develop frozen shoulder
Immobility or reduced mobility	Keeping a shoulder still raises risk — restricted movement can result from a rotator cuff injury, a broken arm, a stroke, or recovery from surgery
Systemic diseases	Diabetes; overactive thyroid (hyperthyroidism); underactive thyroid (hypothyroidism); cardiovascular disease; Parkinson's disease

Can Frozen Shoulder Be Prevented?

Yes — and the answer is surprisingly practical. One of the most common causes of frozen shoulder is not moving a shoulder while recovering from a shoulder injury, a broken arm, or a stroke.

If you've had an injury that makes it difficult to move your shoulder, talk with your healthcare professional about exercises that can help you maintain your ability to move the shoulder joint. These are called range-of-motion exercises — and they are the single most actionable prevention step available.

How Frozen Shoulder Is Diagnosed

Diagnosis is usually straightforward. During a physical exam, a healthcare professional may ask you to move your arm in certain ways to check for pain and see how far you can move it. Two specific measurements matter:

• Active range of motion — how far you can move your arm on your own.

• Passive range of motion — you relax your muscles while the healthcare professional moves your arm.

The diagnostic signature: frozen shoulder affects both active and passive range of motion.

Frozen shoulder can usually be diagnosed with symptoms alone. But imaging tests — such as X-rays, ultrasound, or MRI — can rule out other conditions that mimic it.

Frozen Shoulder Treatment: What Actually Works

Most treatment involves controlling shoulder pain and preserving as much range of motion as possible. The good news: most frozen shoulders get better on their own over time. But a stepped approach speeds recovery and protects function.

Medications

Pain relievers you can buy without a prescription — such as aspirin and ibuprofen (Advil, Motrin IB) — can help reduce pain and inflammation. Sometimes a healthcare professional may prescribe stronger pain-relieving and anti-inflammatory drugs.

Therapies

A physical therapist can teach you range-of-motion exercises to help you move your shoulder better. Doing these exercises regularly is important to help your shoulder get back to as much movement as possible. Two classic examples:

1. Pendulum swing: Let your arm hang down like a pendulum, then gently swing it back and forth or in circles.

2. Finger walk: Pretend your fingers are your feet and walk them up a wall.

Surgery and Other Procedures

If symptoms are serious or don't go away, other options may help:

Procedure	How It Works
Steroid shots (injections)	Corticosteroids injected into the shoulder joint may lessen pain and improve movement — especially if given soon after frozen shoulder begins
Hydrodilatation	Sterile water is gently injected into the shoulder joint to expand and stretch the capsule, making the joint easier to move; sometimes combined with a steroid shot
Manipulation under anesthesia	Under general anesthetic (you're asleep and feel no pain), the healthcare professional moves the shoulder in different directions to loosen the tightened tissue
Surgery	Rare — used only if nothing else helps; removes scar tissue from inside the joint, usually through shoulder arthroscopy (small incisions for instruments guided by a tiny camera)

Self-Care: What You Can Do at Home

Two simple habits support recovery:

1. Continue to use the shoulder and arm as much as possible, given your pain and range-of-motion limits.

2. Apply heat or cold to your shoulder to help relieve pain.

Alternative Medicine Options

Two alternative approaches are commonly tried for frozen shoulder:

Approach	What It Involves
Acupuncture	Hair-thin, flexible needles are placed into the skin at certain points on the body, typically for 15 to 40 minutes; the needles are not inserted very far and most treatments are painless
Nerve stimulation (TENS)	A transcutaneous electrical nerve stimulation unit delivers a tiny electrical current to key points on a nerve path, through electrodes taped to the skin; it is not painful or harmful. It's not known exactly how TENS works — it might block fibers that carry pain, or trigger the release of pain-lessening molecules called endorphins

Preparing for Your Appointment

You may start by seeing your regular healthcare professional, who may refer you to an orthopedist (a doctor specializing in bones, joints, and muscles) or a physiatrist (a doctor focused on physical rehabilitation).

What You Can Do

Before your appointment, gather:

1. A complete description of your symptoms and when they started

2. Information about any past health issues you've had

3. Information about health issues in your blood relatives, such as parents or siblings

4. A list of all the medicines and supplements you take

5. Questions to ask your healthcare professional

What to Expect From the Doctor

Be ready to answer questions such as:

• What makes your symptoms worse?

• Have you ever injured this shoulder? If so, how?

• Do you have diabetes?

• Have you had recent surgeries or times when you had to keep your shoulder still for a while?

Frequently Asked Questions (FAQ)

What is frozen shoulder?

Frozen shoulder, also called adhesive capsulitis, is a condition involving stiffness and pain in the shoulder joint. It occurs when the connective tissue capsule enclosing the joint thickens and tightens, restricting movement. Symptoms typically improve on their own within 1 to 3 years.

What are the three stages of frozen shoulder?

Frozen shoulder develops slowly through three stages: the freezing stage (2 to 9 months), when any movement causes pain; the frozen stage (4 to 12 months), when pain may lessen but stiffness worsens; and the thawing stage (5 to 24 months), when movement gradually improves. For some people, pain worsens at night and disrupts sleep.

What causes frozen shoulder?

The exact reason is unclear, but frozen shoulder occurs when the connective tissue capsule around the shoulder joint thickens and tightens. It is more likely to develop after keeping a shoulder still for a long period, such as after surgery, a broken arm, or a stroke.

Who is at risk for frozen shoulder?

Adults 40 and older — particularly women — are more likely to develop frozen shoulder, as are people with diabetes, overactive or underactive thyroid, cardiovascular disease, or Parkinson's disease. Keeping the shoulder immobilized after a rotator cuff injury, broken arm, stroke, or surgery also raises the risk.

How is frozen shoulder treated?

Treatment focuses on controlling pain and preserving range of motion: over-the-counter pain relievers such as aspirin or ibuprofen, range-of-motion exercises taught by a physical therapist, and, for serious cases, steroid injections, hydrodilatation, or manipulation under anesthesia. Surgery (shoulder arthroscopy) is rare and reserved for cases where nothing else helps.

Can frozen shoulder be prevented?

One of the most common causes is not moving the shoulder while recovering from an injury, broken arm, or stroke. If an injury limits shoulder movement, talk with your healthcare professional about range-of-motion exercises to maintain your ability to move the joint.

Conclusion

Three lessons anchor this guide: frozen shoulder is a capsule problem, not a muscle problem — the connective tissue enclosing the joint thickens and tightens, which is why both active and passive movement are restricted; the condition follows a predictable timeline — three stages over 1 to 3 years that usually resolve, sometimes with minimal treatment; and movement is the medicine — range-of-motion exercises prevent it after injury and drive recovery once it starts, making early, consistent exercise the most important thing you can do.

This guide walked you through the anatomy of the joint capsule, the three stages with their durations, who is at risk, how diagnosis distinguishes frozen shoulder from other problems, every treatment tier from pain relievers to arthroscopy, and the self-care habits that support healing. If shoulder stiffness is already limiting your daily life, the most valuable next step is a conversation with your doctor — because starting range-of-motion work early protects the most function in the long run.

What to do next: If you found this guide useful, explore our guides on achilles tendinitis and ACL injury, which cover other common joints-and-movement conditions, including how to keep moving safely after injury.

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Disclaimer: This content is provided for general informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions about a medical condition.

Related Reading

Neer's Test: How It Checks for Shoulder Impingement, Steps and What Results Mean explains the quick in-office shoulder exam providers use to check for shoulder impingement.

Arthrogram (Arthrography): What It Is, Why It's Done, What to Expect and Results explains how contrast dye and imaging show the ligaments, tendons and cartilage inside a joint, and what to expect.

Shoulder X-Ray: Why It's Done, What It Shows and What to Expect explains the X-ray used first for shoulder pain and injuries.

References

1. Mayo Clinic Staff. Frozen shoulder - Symptoms and causes. Mayo Clinic. May 1, 2026. https://www.mayoclinic.org/diseases-conditions/frozen-shoulder/symptoms-causes/syc-20372684

2. Mayo Clinic Staff. Frozen shoulder - Diagnosis and treatment. Mayo Clinic. May 1, 2026. https://www.mayoclinic.org/diseases-conditions/frozen-shoulder/diagnosis-treatment/drc-20372690

3. Challoumas D, et al. Comparison of Treatments for Frozen Shoulder: A Systematic Review and Meta-analysis. JAMA Netw Open. 2020;3(12):e2029581. PMID 33326025. https://doi.org/10.1001/jamanetworkopen.2020.29581

4. Dyer BP, et al. Diabetes as a risk factor for the onset of frozen shoulder: a systematic review and meta-analysis. BMJ Open. 2023;13(1):e062377. PMID 36599641. https://doi.org/10.1136/bmjopen-2022-062377