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Can you use a heating pad while pregnant?
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- Small lumbar heating pad with low setting and auto shut-off. Best for: Lower back muscle aches in pregnancy. See options on Amazon
- Hot water bottle with a thick fleece cover. Best for: Gentle warmth with no cord. See options on Amazon
- Reusable cold gel pack for back pain. Best for: People who run hot in pregnancy. See options on Amazon
- Maternity belly support band. Best for: Back strain from a growing bump. See options on Amazon
What ACOG and Mayo Clinic say
The American College of Obstetricians and Gynecologists (ACOG) lists a heating pad or warm water bottle as an option for painful back muscles in pregnancy. Its advice comes with three conditions:
- Set heating pads at the lowest possible temperature setting.
- Wrap the pad or warm water bottle in a towel to help prevent burns.
- Limit the time you use heat or cold.
Mayo Clinic gives matching advice: if you use a heating pad, set it to the lowest temperature and wrap it in a towel. Both also mention cold. ACOG notes cold compresses can help ease pain too.
Local heat vs raising your core temperature
The concern in pregnancy is not a warm spot on your back. It is your whole body getting hot. ACOG says core body temperature rises when you use saunas and hot tubs and that this rise can be harmful for the fetus, especially early in pregnancy. Its advice on saunas and hot tubs is that it's best not to.
MotherToBaby, a service of experts on exposures in pregnancy, links fever or overheating before the 6th week of pregnancy with neural tube defects, and fever in early pregnancy, before week 12, with some other birth defects. It defines fever as a temperature over 101 degrees F (38.3 degrees C).
A heating pad on low, on a small area, for a short time is a very different exposure. Still, do not use a heat pad wrapped around your body, under heavy blankets, or for long stretches.
Where to put heat, and where not to
| Area | Heat OK? | Notes |
|---|---|---|
| Lower or mid back | Yes, on low | The use ACOG and Mayo Clinic describe |
| Hips and buttock | Usually, on low | Keep it brief and wrapped |
| Neck and shoulders | Usually, on low | Same rules apply |
| Belly | Avoid | Our sources do not address belly heat; ask your provider before warming the abdomen |
| Anywhere you are falling asleep | No | Switch off before you rest |
If cramping in your belly is what you want to ease, call your provider rather than reaching for heat. ACOG notes that back pain can be a symptom of preterm labor.
Safe-use checklist for pregnancy
- Lowest setting only, as ACOG and Mayo Clinic advise.
- Towel or cover between the pad and your skin.
- Short sessions, then off. Set a timer.
- Sit or lie on your side with the pad against your back, not your belly.
- Never sleep with it on. Pregnancy fatigue makes dozing off more likely, so choose a pad with auto shut-off.
- No hot tubs or saunas, per ACOG.
Positioning can help as much as heat. See the pregnancy wedge pillow guide for side-sleeping support.
When back pain in pregnancy needs a call
ACOG says to call your ob-gyn if you have severe back pain or if pain goes on for more than two weeks. ACOG also lists these as reasons to call when they come with back pain:
- Vaginal bleeding
- Fever
- Burning during urination
It also notes back pain can be a symptom of preterm labor, which is labor before 37 weeks. If back pain comes with cramping, tightening or contractions before 37 weeks, call your provider right away.
What to look for when you buy
Small lumbar heating pad with low setting and auto shut-off
Best for: Lower back muscle aches in pregnancy
A small pad heats only the back, and a true low setting matches ACOG's advice to use the lowest possible temperature.
Watch out: Keep it off your belly, and switch it off before you rest.
See options on AmazonHot water bottle with a thick fleece cover
Best for: Gentle warmth with no cord
ACOG and Mayo Clinic both name a warm water bottle wrapped in a towel as an option for sore back muscles.
Watch out: Use warm, not boiling, water and keep the cover on.
See options on AmazonReusable cold gel pack for back pain
Best for: People who run hot in pregnancy
ACOG notes cold compresses can also ease pain, without adding any warmth to your body.
Watch out: Wrap it in a cloth and limit sessions.
See options on AmazonMaternity belly support band
Best for: Back strain from a growing bump
ACOG suggests an abdominal support garment or maternity pants with a supportive band to help ease back pain.
Watch out: Should feel supportive, not tight; ask your provider if unsure.
See options on AmazonQuestions people ask
- Is it safe to use a heating pad on my back while pregnant?
- ACOG says you can, at the lowest setting, wrapped in a towel, for limited time.
- Can I put a heating pad on my pregnant belly?
- Avoid it. Our sources do not support heating the abdomen, so ask your provider first. Belly cramping should prompt a call, not heat.
- Why are hot tubs a concern in pregnancy but not heating pads?
- Hot tubs and saunas raise core body temperature, which ACOG says can be harmful to the fetus. A low pad on a small area does not heat the whole body in the same way.
- Can I sleep with a heating pad while pregnant?
- No. Use it while awake for short sessions and switch it off before you rest.
- When should I worry about back pain in pregnancy?
- ACOG says to call your ob-gyn if it is severe, lasts more than two weeks, or comes with bleeding, fever or painful urination. Back pain can also be a sign of preterm labor, so call right away if it comes with cramping or contractions.
Sources
- Back Pain During Pregnancy (acog.org), ACOG
- Can I use a sauna or hot tub early in pregnancy? (acog.org), ACOG
- Back pain during pregnancy: 7 tips for relief (mayoclinic.org), Mayo Clinic
- Fever/Hyperthermia (mothertobaby.org), MotherToBaby