Frozen Shoulder (Adhesive Capsulitis)

Common Symptoms

• Progressively worsening shoulder pain, often worse at night
• Stiffness and loss of range of motion in multiple directions — not just with one specific movement
• Difficulty with overhead reaching, reaching behind the back, or rotating the arm outward
• Motion that's limited even when someone else tries to move your arm for you (passive stiffness), which helps distinguish it from other shoulder problems
• Gradual, sometimes slow improvement over many months as the condition runs its course

Why It Happens

The exact trigger isn't always clear, but the shoulder joint capsule becomes inflamed and then progressively thickens and contracts, restricting the joint's normal range of motion. It's more common after a period of shoulder immobility (such as after surgery or injury elsewhere) and in people with diabetes or thyroid conditions, though it can also occur without any clear precipitating factor.

Why It Can Become Persistent

Frozen shoulder is notorious for its slow natural course — it can take well over a year to fully resolve on its own, and a meaningful number of people are left with some residual stiffness even after the acute phases pass. This long natural timeline is part of why people look for ways to speed recovery or reduce pain during the freezing and frozen phases.

Who Commonly Gets It

Frozen shoulder is most common in adults between about 40 and 60, more often in women, and is associated with diabetes, thyroid disorders, and a prior period of shoulder immobilization (such as after a fracture, surgery, or stroke).

How It Is Usually Diagnosed

Diagnosis is usually clinical — a history of progressive pain and stiffness, plus a physical exam showing restricted range of motion in both active and passive testing. Imaging isn't always necessary but may be used to rule out other causes of shoulder stiffness or pain, such as rotator cuff pathology or arthritis.

Traditional Treatment Options

• Physical therapy: Guided stretching and mobility work is a mainstay of treatment, particularly during the frozen and thawing phases.
• NSAIDs: Sometimes used for pain control, particularly during the more painful freezing phase.
• Corticosteroid injection: Can help reduce pain and may modestly speed early recovery, particularly when done earlier in the course.
• Hydrodilatation: A procedure using fluid injection to stretch the joint capsule, sometimes used for persistent stiffness.
• Manipulation under anesthesia or surgical release: Reserved for cases that remain significantly limited despite a reasonable trial of conservative treatment.

Why Someone Might Start Looking for Another Option

Because frozen shoulder can take a year or more to resolve on its own, people understandably look for ways to reduce pain and speed the process along, particularly during the frozen phase when stiffness is most limiting.

Where Shockwave Therapy May Fit

A 2022 systematic review and meta-analysis of 20 randomized trials found shockwave therapy added to routine treatment improved short-term pain and shoulder function compared with routine treatment alone, though longer-term range-of-motion gains were less consistent across the pooled trials. A smaller 2025 randomized trial combining shockwave therapy with structured physical therapy also found greater pain reduction, less disability, and better range of motion at 12 weeks than physical therapy with sham shockwave. This is a reasonably researched area for shockwave therapy, generally used alongside — not instead of — physical therapy.

How Shockwave Treatment Works for This Area

Acoustic pressure waves are applied to the shoulder capsule and surrounding tissue, typically combined with a structured physical therapy program rather than used on its own. Your provider will discuss where you are in the freezing/frozen/thawing course, since that affects what's likely to help.

What the Treatment Feels Like

Most patients describe a firm tapping or pressure sensation; because a frozen shoulder is often quite tender to begin with, your provider will discuss what to expect and adjust based on your tolerance.

What Happens During Your First Visit

Your visit begins with a provider evaluation focused on your history and a physical exam relevant to your complaint. If shockwave therapy is determined to be clinically appropriate, your first treatment can typically be provided the same visit. See our What to Expect page for the full walkthrough.

Who May Not Be Appropriate

• Anyone who has not yet had a medical evaluation to confirm the diagnosis and rule out other causes of shoulder stiffness
• Suspected rotator cuff tear or significant shoulder instability, which need their own evaluation
• Certain circulatory, neurological, or bleeding-related conditions, per your provider's screening
• Active infection, open wounds, or certain bone conditions at the treatment site

This list is not exhaustive. Your provider will screen for contraindications during your evaluation.