Frozen Shoulder: Using Heat Before Your Stretches

Frozen shoulder is stiffness first and pain second.

You can’t reach behind your back to fasten a bra or pull out a wallet, can’t reach the top shelf, and putting on a shirt takes planning. Heat before your stretches is one of the few home measures that genuinely helps.

What’s happening in the joint

The capsule, the sleeve of tissue around the shoulder joint, becomes inflamed and then thickens and tightens. The joint physically can’t move as far, which is why someone else lifting your arm for you doesn’t get any further than you can.

It usually runs in three phases:

• Freezing: pain leads, often worst at night. Movement shrinks month by month.
• Frozen: pain settles, stiffness dominates. This is where heat and stretching earn their place.
• Thawing: movement gradually returns.

The whole thing takes a long time, often well over a year.

It’s more common in people with diabetes and thyroid conditions, and after a period of keeping the arm still…but research still hadnt shown why it happens, so…many patients and doctors are baffled by it.

Heat first, then stretch

Warm tissue stretches further than cold tissue. Heating the shoulder for 15 minutes before your exercises means you get more range out of the same effort, and it hurts less. That sequence is the whole point of “my physio said use heat”, and the evidence behind it is summarised in heat before manual therapy.

1. Sit upright. Drape the pad over the top and front of the shoulder, cover on, low setting. A wrap holds position better on a shoulder than a flat pad: heated wraps vs a flat pad.
2. 15 minutes, then take it off and check the skin.
3. Do the stretches below straight away, while you’re still warm.
4. Repeat two or three times a day. Frequent short sessions beat one long one.

If pain flares after stretching, a cold pack for 10 minutes afterwards settles it. On choosing between the two, see heat or ice: a physio’s decision guide.

Four stretches

Move into a gentle stretch, not into sharp pain. Hold each for 20–30 seconds, 3 times.

1. Pendulum. Lean forward, support yourself with the good arm on a table, let the stiff arm hang. Swing it gently in small circles, then side to side.
2. Wall walk. Face a wall, walk your fingers up it as high as you can, hold, walk back down.
3. Towel stretch (reaching behind). Hold a towel behind your back, good hand above, stiff hand below. Gently pull upwards with the top hand.
4. Cross-body stretch. Bring the stiff arm across your chest, using the other hand at the elbow to draw it closer.

Consistency matters more than intensity here. Short sessions several times a day, every day, for months.

Night pain

Lying on the affected side is usually the problem. Sleep on the other side with a pillow hugged in front of you to support the stiff arm, or on your back with a pillow under the elbow. Heat before bed can help, but switch the pad off and unplug it before you sleep.

See is it safe to sleep with a heating pad on? and warmth before bed.

Don’t use heat if…

• The shoulder became stiff straight after a fall or dislocation, before it’s been assessed
• There’s a healing surgical wound over the shoulder. See heat after surgery.
• You have reduced feeling in the arm

Full list: who should not use a heating pad.

See someone about it

Frozen shoulder is worth a proper diagnosis, because a stiff shoulder can also be arthritis, a rotator cuff problem or referred neck pain, and those need different treatment. A physiotherapist can confirm it and give you a programme; some people also benefit from an injection during the painful phase.

Pain that sits on the shoulder blade rather than the joint is a different problem again: heating pad for shoulder blade pain.

Get it checked sooner if you have diabetes, if the shoulder is hot and swollen with fever, or if you have pins and needles or weakness down the arm.

Clinically reviewed by: Nigel Chua (Hand Occupational Therapist) & Louise Yow (Physiotherapist). This article is general information, not a diagnosis. electricheatpad.com sells electric heat pads.