Heating Pad for Lower Back Pain: How to Use It Properly

A heating pad on a tight lower back feels good within minutes. Whether it does more than feel good depends on how you use it: where you put it, how you lie, and what you do after the 20 minutes are up.

Does heat help lower back pain?

For the common kind of lower back pain, the stiff, achy, muscle-tight kind without numbness down the leg, yes. A Cochrane review found heat wraps eased pain and helped people move better in the short term for back pain of up to three months. Heat relaxes the muscles guarding your back, increases blood flow and quietens pain signals for a while.

That short-term window matters. Heat buys you an easier half hour. Use it to move, because movement is what gets a sore back better.

Not all back pain is this kind. See when a heating pad helps back pain and when it won’t.

The best positions

Rest the pad on top of you. Lying on a pad presses it into your skin, traps the heat and raises the burn risk.

• Lying on your side, knees bent, a pillow between them. Lay the pad over your lower back. This suits a back that hates lying flat.
• Lying on your front with a pillow under your hips, pad draped across your lower back. Skip this one if lying on your front increases the pain.
• Sitting, with the pad between your lower back and the chair. Sit tall and lean back lightly. Don’t slump your full weight into it.

The pad needs to span hip to hip, which is wider than most people expect: which size heat pad for which body part.

When to use it

• First thing in the morning, if your back is stiffest when you get up. 15–20 minutes before you start moving around.
• After a long stretch of sitting: a long drive, a day at the desk, a flight. See back pain after a long flight.
• Before your exercises, to loosen the muscles so the movements feel easier.
• When it seizes up overnight. See back spasm at night.

Keep each session to 15–20 minutes on low, with at least an hour between. See how long to use a heating pad.

What to do straight after

Pick two or three of these while the muscles are warm. Move slowly, stay within comfort, and stop anything that sends pain down your leg.

1. Knee rocks. Lie on your back, knees bent, feet flat. Let both knees fall gently to one side, then the other. 10 each way.
2. Pelvic tilts. Same position. Flatten your lower back into the floor, then let it arch a little. 10 times.
3. Knee to chest. Hug one knee towards your chest, hold 10 seconds, swap. 5 each side.
4. A 10-minute walk. Often the best thing you can do for a stiff back.

In the first fortnight of a new episode, the plan matters more than the pad: back pain, the first two weeks.

Don’t use heat if…

• You fell or had a knock and the area is swollen or bruised.
• You have reduced feeling over your lower back or buttocks.
• You might fall asleep with it on. See is it safe to sleep with a heating pad on?

Full list: who should NOT use a heating pad.

Get checked instead if…

• You have numbness around your groin or buttocks, or trouble passing or holding urine. Go to A&E now.
• Pain, numbness or weakness spreads down one or both legs. See sciatica.
• You have a fever, unexplained weight loss, or a history of cancer.
• The pain started after a fall, especially if you’re older or have osteoporosis.
• It hurts just as much lying still at night as when you move.
• It isn’t improving after two weeks.

Choosing a pad for your back: what a physio looks for and where to buy one in Singapore.

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.