Heartburn is one of the most common discomforts of pregnancy, affecting roughly 44% of pregnant women overall. It becomes increasingly likely as pregnancy progresses, showing up in about 26% of women during the first trimester, 33% in the second, and 56% by the third. So yes, it’s normal, and you’re far from alone if you’re dealing with it.
Why Pregnancy Causes Heartburn
Two things work together to create the perfect conditions for reflux during pregnancy: hormones and physical pressure.
Progesterone, which rises steadily throughout pregnancy, relaxes the ring of muscle at the top of your stomach. That muscle normally acts as a one-way valve, keeping stomach acid where it belongs. When it loosens, acid and partially digested food can wash back up into your esophagus, producing that familiar burning sensation. Progesterone also slows digestion overall, meaning food sits in your stomach longer than usual and has more opportunity to trigger reflux.
As your uterus grows, it pushes upward against your stomach, compressing it and adding physical pressure that forces contents back toward your esophagus. This is why heartburn tends to peak in the third trimester, when the uterus is largest and progesterone levels are at their highest.
Foods and Habits That Make It Worse
Because your digestive system is already working slower than normal, certain foods and eating patterns are more likely to set off heartburn than they would outside of pregnancy. The usual suspects apply: spicy foods, greasy or fatty meals, citrus, and chocolate. But how and when you eat matters just as much as what you eat.
Large meals are a common trigger. Your stomach has less room than usual and is emptying more slowly, so filling it to capacity creates a backup. Eating several smaller meals spread across the day, more like grazing, keeps the volume lower at any given time. Drinking fluids between meals rather than with them also helps, since liquid adds to the total volume in your stomach. And eating within an hour or two of lying down is one of the most reliable ways to bring on nighttime heartburn.
Lifestyle Changes That Help
Non-medication strategies are the standard first step, though it’s worth noting that formal research on their effectiveness during pregnancy is limited. A Cochrane review found no strong evidence-based recommendation for any single approach, but the following are consistently suggested by clinicians and widely reported as helpful by pregnant women.
For nighttime symptoms, elevating your upper body makes a real difference. Raising the head of your bed, using a wedge pillow, or propping yourself up so you’re sleeping at a slight incline keeps gravity working in your favor. Sleeping on your left side with knees bent is generally recommended once your abdomen starts expanding, though right-side sleeping is also considered safe if it’s more comfortable for you.
Chewing gum after meals can help by stimulating saliva production, which neutralizes acid in the esophagus. Avoiding tight clothing around your midsection, not bending over right after eating, and staying upright for at least one to two hours after meals are all small adjustments that add up.
When Lifestyle Changes Aren’t Enough
If heartburn persists despite adjusting your diet and habits, over-the-counter antacids are considered the safest first-line medication during pregnancy. They’re available in tablet or liquid form, and all standard products are safe at recommended doses.
When antacids alone don’t resolve symptoms, a class of medications called H2 blockers is the typical next step. These reduce the amount of acid your stomach produces. Famotidine is the most commonly recommended option in this category. (Ranitidine, a formerly popular alternative, was recalled due to contamination concerns and is no longer available.)
For more persistent or severe heartburn, proton pump inhibitors (PPIs) are also an option. These are stronger acid-reducing medications, and scientific reviews have not found an increased risk to the baby when they’re used during pregnancy. A short initial course is available without a prescription, but longer use requires a doctor’s guidance.
When Heartburn Might Signal Something Else
In rare cases, what feels like heartburn can actually be upper abdominal pain related to preeclampsia or a related condition called HELLP syndrome. The key difference is context. Normal pregnancy heartburn is a burning sensation in your chest or throat that’s clearly tied to eating. Preeclampsia-related pain tends to sit in the upper right abdomen, sometimes just below the ribs, and comes alongside other warning signs: sudden or severe swelling, visual disturbances like blurriness or seeing spots, persistent headaches, or confusion. If your “heartburn” doesn’t respond to antacids and is accompanied by any of those symptoms, that’s a situation to take seriously and get evaluated promptly.
Does It Go Away After Delivery?
For most women, heartburn improves gradually after childbirth as progesterone levels drop and the uterus returns to its normal size. The relief isn’t always instant, but the underlying causes resolve on their own. About 20% of women continue to experience some reflux symptoms in the postpartum period, and roughly 5% still report frequent symptoms a year after delivery. If heartburn lingers well beyond the first few weeks postpartum, it may be worth discussing with your doctor, since pre-existing reflux tendencies can sometimes be unmasked or worsened by pregnancy.