Frozen Shoulder: Causes, Stages, and How PT Helps

September 22, 2026

Frozen shoulder moves through three stages — freezing, frozen, and thawing — and the right treatment is different in each one. Pushing aggressively into stretch during the painful freezing stage often makes things worse, while the same approach during thawing can be exactly right. Knowing which stage you are in changes what should happen next.

What frozen shoulder actually is

Frozen shoulder, or adhesive capsulitis, involves inflammation and progressive thickening of the capsule surrounding the shoulder joint. The capsule tightens, and the shoulder loses motion in a characteristic pattern — external rotation is usually affected first and most severely.

A defining feature is that motion is limited whether you move the arm yourself or someone else moves it for you. That distinguishes it from problems like rotator cuff tears, where you may be unable to lift the arm yourself but it moves when assisted.

Who tends to get it

  • Most commonly between roughly ages 40 and 60
  • More often in women than men
  • Substantially more common in people with diabetes
  • Associated with thyroid disorders
  • Can follow a period of shoulder immobilization after injury or surgery

The diabetes association is strong enough that it is worth mentioning to your physician if you develop frozen shoulder and have not been screened recently.

Stage 1: Freezing

Often described as lasting several months, this stage is dominated by pain. The shoulder aches at rest, hurts at night, and motion is progressively decreasing.

Treatment focus: pain control, gentle motion within tolerance, sleep positioning, and protecting the shoulder from being aggravated. This is the stage where forceful stretching tends to backfire — the tissue is actively inflamed and responds to aggression by becoming more painful and more restricted.

Stage 2: Frozen

Pain typically begins to settle, but stiffness dominates. Reaching overhead, behind your back, or across your body becomes genuinely difficult, and daily tasks like fastening a bra or reaching a seatbelt become the practical problem.

Treatment focus: restoring motion becomes the priority as pain allows. This typically combines manual therapy with a consistent home program, plus strengthening of the surrounding shoulder blade and rotator cuff muscles that have weakened from disuse.

Stage 3: Thawing

Motion gradually returns. This stage can be lengthy, and this is where sustained, progressive stretching and strengthening pay off most.

Treatment focus: progressive range of motion, strengthening through the newly available range, and returning to normal use of the arm.

How long does frozen shoulder last?

Frozen shoulder is often described as self-limiting, with the full course commonly cited as one to three years. That framing can be misleading in two ways.

First, "self-limiting" does not mean "requires no treatment" — appropriate care influences comfort and function throughout, and how much motion you end up with. Second, a meaningful proportion of people are left with some residual restriction long term, so the expectation that it fully resolves on its own for everyone is not well supported.

Should I push through the pain?

Not in the freezing stage. This is the single most common mistake, and it is understandable — stiffness intuitively suggests stretching harder. During active inflammation that typically increases pain and can prolong the process.

As the shoulder moves into the frozen and thawing stages, progressively firmer stretching becomes appropriate. Matching intensity to stage is much of the skill in treating this.

Frozen shoulder treatment in East Tennessee

Tristar Physical Therapy treats frozen shoulder at all eight of our East Tennessee clinics: Morristown, Maryville, Johnson City, Newport, Bean Station, Jefferson City, Rogersville, and New Tazewell. Evaluation establishes which stage you are in so treatment matches it.

For a broader overview, see our page on shoulder pain.

Find your nearest Tristar clinic or request an appointment.

Reviewed by the Tristar Physical Therapy clinical team. This article is general education and is not a substitute for individual medical advice.

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