Frozen Shoulder: Why It Happens and How Long It Lasts

Frozen shoulder, also known as adhesive capsulitis, is a condition characterized by stiffness, pain, and reduced range of motion in the shoulder joint. It can make everyday activities—like reaching for a shelf or fastening a seatbelt—difficult. Understanding why it happens and how long it lasts can help you manage symptoms and seek appropriate care without undue worry.

What Is Frozen Shoulder?

Frozen shoulder occurs when the connective tissue (capsule) surrounding the shoulder joint becomes thickened and tight. This limits movement and often leads to pain. The condition typically develops in three overlapping stages:

1. Freezing Stage

   • Gradual onset of pain, which worsens with movement.
   • Shoulder range of motion begins to decrease.
   • Lasts about 6 to 9 months.

2. Frozen Stage

   • Pain may lessen, but stiffness remains or worsens.
   • Daily activities become more challenging.
   • Lasts about 4 to 12 months.

3. Thawing Stage

   • Shoulder movement gradually improves.
   • Pain continues to fade.
   • Lasts about 6 months to 2 years.

Overall, frozen shoulder can last anywhere from 1 to 3 years if untreated. With proper care, many people recover sooner.

Why Frozen Shoulder Happens

While the exact cause is unclear, several factors increase the risk of developing frozen shoulder:

• Age and Sex

  • Most common between ages 40 and 60.
  • Women are more often affected than men.

• Injury or Immobilization

  • Recovery from shoulder surgery or fracture may limit movement.
  • Wearing a sling for an extended period can contribute.

• Medical Conditions

  • Diabetes: People with diabetes have a higher incidence.
  • Thyroid disorders (hypo- or hyperthyroidism).
  • Cardiovascular disease, Parkinson's disease, or other systemic conditions.

• Inflammation

  • Chronic inflammation of the shoulder joint lining (synovium) can lead to scarring and stiffness.

How It Develops

• The shoulder joint is a ball-and-socket joint with a capsule of connective tissue that keeps the bones in place.
• When this capsule becomes inflamed, it forms thick scar tissue and contracts, "freezing" the joint.
• Over time, the capsule may loosen, allowing movement to return during the thawing stage.

Signs and Symptoms

Symptoms of frozen shoulder tend to develop slowly and worsen over time:

• Dull or achy pain deep in the shoulder or upper arm, often worse at night
• Stiffness making it hard to reach overhead, behind the back, or out to the side
• Limited active (you move) and passive (someone else moves you) range of motion
• Pain when applying pressure to the shoulder

Diagnosing Frozen Shoulder

A healthcare professional will typically:

1. Review your medical history and symptoms.
2. Perform a physical exam, checking the range of motion actively and passively.
3. Order imaging tests (X-ray, ultrasound, or MRI) to rule out other conditions such as arthritis or a rotator cuff tear.

If you're experiencing shoulder pain and stiffness but haven't been formally diagnosed yet, Ubie's free AI symptom checker can help you identify possible causes of your symptoms in just a few minutes and guide you toward the right next steps.

Treatment Options

Treatment focuses on relieving pain and restoring motion. It often involves a combination of:

1. Physical Therapy

• Stretching and Strengthening Exercises

  • Gentle, guided stretches to improve flexibility.
  • Gradual strengthening to support shoulder stability.

• Manual Therapy

  • Therapist moves your shoulder to increase motion.

2. Medications

• Over-the-Counter Pain Relievers

  • Acetaminophen or nonsteroidal anti-inflammatory drugs (NSAIDs) can reduce pain and inflammation.

• Steroid Injections

  • Corticosteroid shots directly into the shoulder capsule may ease pain and improve mobility, especially in the freezing stage.

3. Heat and Cold Therapy

• Heat Packs
  • Apply before stretching to relax muscles.
• Cold Packs
  • Use after exercise or when pain flares to reduce inflammation.

4. Joint Distension

• Injecting sterile water into the joint capsule to stretch it and break up adhesions.

5. Surgery or Manipulation (Rarely Needed)

• Manipulation Under Anesthesia
  • The doctor moves your shoulder to help break up scar tissue while you're sedated.
• Arthroscopic Capsular Release
  • Minimally invasive surgery to cut through tight portions of the capsule.

These procedures are generally reserved for cases that don't improve after 6 to 12 months of conservative treatment.

Self-Care Strategies

In addition to medical treatment, you can support recovery with home care:

• Maintain gentle daily shoulder activity to prevent further stiffness.
• Practice prescribed stretches consistently—set reminders if needed.
• Use ergonomic adjustments at work (e.g., proper chair height, arm support).
• Apply heat before exercises and cold afterward to manage discomfort.
• Prioritize good posture: shoulders back, chest open, head aligned over spine.

How Long It Lasts

• Mild Cases: May resolve within 1 year with consistent therapy and self-care.
• Typical Course: 1 to 3 years from onset through thawing.
• Severe or Delayed Treatment: Recovery may take longer, and residual stiffness can persist.

Everyone's timeline is different, and factors such as underlying health issues (e.g., diabetes) can prolong recovery.

When to Seek Further Help

• Persistent, worsening pain despite home care and therapy.
• Signs of infection (fever, redness, warmth) around the shoulder.
• Sudden severe pain following injury.
• Any new symptoms that feel serious or life threatening.

If you experience any concerning signs, speak with a healthcare provider promptly.

Key Takeaways

• Frozen shoulder involves painful stiffness of the shoulder capsule, progressing through freezing, frozen, and thawing stages.
• It most often affects people aged 40–60, especially women, and those with diabetes or recent shoulder immobilization.
• Recovery can take 1–3 years but often improves sooner with physical therapy, medication, and consistent self-care.
• Not sure what's causing your shoulder pain? Take Ubie's free AI-powered symptom checker test to receive personalized insights and find out when you should see a doctor.
• Always consult a doctor if symptoms are severe, worsen unexpectedly, or if you're concerned about other serious conditions.

Frozen shoulder can be frustrating, but with patience, guided therapy, and self-care, most people regain significant shoulder movement and return to normal activities. If you have any doubts about your symptoms or treatment plan, don't hesitate—speak to a doctor for personalized advice and to rule out anything serious.