They look similar and do different jobs.
A heat pad treats a sore area for twenty minutes. An electric blanket warms a whole bed for comfort. Buying one expecting the other is a common and slightly expensive mistake.
The difference that matters
| Heat pad | Electric blanket | |
|---|---|---|
| Job | Treat one sore area | Warm a whole bed |
| Heat level | Therapeutic, warm enough to relax muscle | Gentle, comfort level |
| Session | 15 to 20 minutes | Often designed to pre-warm, some rated for overnight |
| Size | Around 30 x 40 cm | Bed-sized |
| Use on | Back, belly, shoulder, knee | The whole body, through bedding |
A blanket spread across a bed can’t put useful warmth into a specific sore back. A heat pad can’t warm your feet and shoulders at the same time. Neither is a flaw; they were built for different things. On the second row, what temperature should a heating pad be?; on the third, how long to use one; on the fourth, the size guide.
Which you want
- A stiff lower back, period cramps, an achy shoulder: heat pad.
- Cold in bed because the aircon is set for someone else: a thicker blanket first, and then consider an electric one. If it’s mainly your hands and feet, see cold hands and feet.
- Both problems: the heat pad is the one that treats something. A blanket is comfort.
In Singapore the honest answer for the second case is usually a warmer duvet or the aircon a degree higher. See warmth before bed, and for the daytime version, freezing in the office aircon.
Overnight: read the manual, not the marketing
Some electric blankets are made only to pre-warm the bed and must be switched off before you get in.
Others are rated for overnight use on a low setting. These are different products and the packaging doesn’t always make it obvious. Check the manual, and if it doesn’t say, assume pre-warm only.
A heat pad is never for overnight, whatever its controller offers. It concentrates heat on one patch of skin, and hours of contact is how low-temperature burns happen.
See is it safe to sleep with a heating pad on? and toasted skin syndrome.
Blanket safety, briefly
- Lie flat, never folded or rucked up. Folds concentrate heat.
- Nothing heavy on top, and no other bedding trapping the heat.
- Check the cord and element yearly, and replace an old blanket rather than nursing it. Elderly relatives often have one that predates the manual. The same checks apply to a pad: how long does a heat pad last.
- Not for anyone with reduced sensation, incontinence, or who can’t operate the controls. See heating pads and diabetes.
The same rule governs both products: heat you can’t feel building is heat that can damage skin. See who should not use a heating pad.
On running costs, a pad is negligible and a blanket left on all night is the one that shows up on a bill: what a heat pad costs to run.
If you’re buying for elderly parents
Buy the heat pad, not the blanket.
A pad is used for twenty minutes while someone is awake and can be supervised. A blanket runs all night on a person whose skin senses heat less well, who may be on medication that makes them sleep deeply, and who may not report a burn until it blisters.
More: safe heat at home for elderly parents, a heat pad for parents who always feel cold, and giving one as a gift.
Choosing a pad: which size for which body part and what a physio looks for.
The heat pad we use
We’ve supplied the Bremed BD7800 since 2010. It holds a steady temperature, covers a whole lower back and has a machine-washable cotton cover. Physiotherapy clinics in Singapore use it with their patients.
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.
