What's Happening

Frozen shoulder (adhesive capsulitis) occurs when the capsule surrounding the shoulder joint thickens, tightens, and grows stiff bands of tissue, progressively restricting motion. It typically resolves — but often only after moving through three distinct, slow-moving stages that can together span one to three years.

By the Numbers

2–5%

of adults will develop frozen shoulder

1.4:1

ratio of women to men affected

40–65

typical age range at onset

Metabolic & Other Risk Factors

Frozen shoulder is closely tied to metabolic health — far more than most shoulder conditions:

  • Diabetes raises risk nearly fourfold — up to 20% of people with diabetes develop frozen shoulder, versus 2–4% of the general population. Sustained high blood sugar promotes collagen cross-linking and fibrosis in the shoulder capsule

  • Thyroid disorders (hypo- or hyperthyroidism) are a significant independent risk factor

  • Obesity, high cholesterol, and high blood pressure are all associated with increased risk

  • A period of immobilization — after surgery, a fracture, or a stroke — can also trigger it

The Three Phases: What to Expect

1. Freezing (2–9 months)

What you'll feel: gradually worsening pain, often worse at night, with motion becoming progressively more limited.

Focus of care: calming pain, gentle guided motion, and protecting the joint from further irritation.

2. Frozen (4–12 months)

What you'll feel: pain gradually eases, but stiffness peaks — reaching overhead, out to the side, or behind your back is significantly limited.

Focus of care: more assertive stretching and hands-on manual therapy to regain motion.

3. Thawing (months to 1+ year)

What you'll feel: motion gradually, sometimes slowly, returns — often the longest phase to fully complete.

Focus of care: strengthening to restore confident, full use of the shoulder.

Stretches That Help

Used throughout the freezing and frozen phases — always stay within a pain-free range; never force a stretch.

  • Pendulum Stretch: Lean over slightly and let the arm hang; gently swing it in small circles, 10 times each direction.

  • Towel Stretch: Hold a towel behind your back with both hands; use the good arm to gently pull the affected arm upward.

  • Cross-Body Reach: Lift the affected arm with your good hand and draw it gently across your chest; hold 15–20 seconds.

  • Finger Walk: Facing a wall, walk your fingers slowly up it to shoulder height, then back down; repeat 10–20 times.

Bottom line: Frozen shoulder often runs its full course over one to three years — but treatment matched to each stage meaningfully reduces pain and disability along the way and speeds the return of motion. If you have diabetes or a thyroid condition, earlier treatment matters even more.