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Heartburn (acid reflux) during pregnancy

Prevention is your best bet in avoiding the gnawing, burning feeling that comes with pregnancy heartburn.

woman at sink looking sick
Photo credit: iStock.com / Vesna Andjic

What does pregnancy heartburn feel like?

Heartburn is a burning sensation that often extends from the bottom of the breastbone to the lower throat. Many women experience heartburn for the first time during pregnancy, and although it's common and generally harmless, it can be quite uncomfortable. More than two-thirds of women suffer from heartburn or acid reflux during pregnancy.

Heartburn and related issues like gas and bloating during pregnancy usually start in the second or third trimester, but it can be sooner for some women. The discomfort will probably come and go until your baby is born, but in most cases heartburn is no longer a problem after delivery.

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What causes heartburn during pregnancy?

Some of the hormonal and physical changes in your body during pregnancy can cause heartburn. For example, the placenta produces the hormone progesterone, which relaxes the smooth muscles of the uterus. This hormone also relaxes the valve that separates the esophagus from the stomach, which can make gastric acid seep back up and cause that unpleasant burning sensation in your throat.

Progesterone can also make digestion sluggish by slowing down the wavelike contractions of your esophagus and intestines. Later in pregnancy, your growing baby crowds your abdominal cavity, pushing stomach acid back up into the esophagus.

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What helps with heartburn during pregnancy?

Prevention is your best bet to reduce heartburn during your pregnancy. Though you may not be able to avoid the condition entirely, here are some ways to prevent it and minimize any discomfort:

  • Avoid food and drinks that upset your stomach. These include carbonated drinks, alcohol, caffeine, chocolate, citrus fruits and juices, tomatoes, mustard, vinegar, mint products, processed meats, and foods that are fatty, spicy, fried, or highly seasoned.
  • Eat small meals. Instead of three large meals, eat several small ones throughout the day. Take your time eating and chew thoroughly.
  • Drink water in between meals. It's important to drink plenty of water daily during pregnancy, but too much liquid can distend your stomach. Stay hydrated by drinking most of your water in between meals.
  • Chew gum after eating. Chewing gum stimulates your salivary glands, and saliva can help neutralize acid.
  • Eat two or three hours before bedtime. This gives your body time to digest before you lie down.
  • Sleep propped up. Elevate your upper body by about 6 inches with several pillows or a wedge when you sleep. This helps stomach acid stay down and aids digestion.
  • Dress comfortably. Wear loose, relaxed clothing. Don't wear clothes that are tight around your waist and tummy.
  • Ask your provider about heartburn medicines. An antacid that contains magnesium or calcium may ease discomfort. Check with your provider before taking one because some brands are high in sodium or contain aluminum or aspirin. You can also talk to your provider about prescription heartburn medications that are safe during pregnancy.
  • Don't smoke. In addition to contributing to serious health problems, smoking boosts the acid in the stomach. (If you're having trouble quitting, ask your provider for a referral to a smoking cessation program.)

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BabyCenter's editorial team is committed to providing the most helpful and trustworthy pregnancy and parenting information in the world. When creating and updating content, we rely on credible sources: respected health organizations, professional groups of doctors and other experts, and published studies in peer-reviewed journals. We believe you should always know the source of the information you're seeing. Learn more about our editorial and medical review policies.

ACG. Undated. Pregnancy in gastrointestinal disorders. American College of Gastroenterology. http://s3.gi.org/physicians/PregnancyMonograph.pdfOpens a new window [Accessed August 2021]

ACOG. 2020. Problems of the digestive system. American College of Obstetricians and Gynecologists. https://www.acog.org/Patients/FAQs/Problems-of-the-Digestive-SystemOpens a new window [Accessed August 2021]

Katz PO et al. 2013. Diagnosis and management of gastroesophageal reflux disease. American Journal of Gastroenterology 108:308-328. https://gi.org/guideline/diagnosis-and-managemen-of-gastroesophageal-reflux-disease/Opens a new window [Accessed August 2021]

Karisa Ding

Karisa Ding is a freelance health writer and editor with expertise in preconception, pregnancy, and parenting content. A mother of two, Ding finds great joy in supporting new and expectant parents by providing information they need for the life-changing journey ahead. Ding lives in San Francisco with her family.

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