Heartburn in pregnancy: what helps and what is safe

Two things stack up. Early on, the hormone progesterone relaxes the muscular valve between the esophagus and the stomach, so stomach acid can splash upward after meals. Later, the growing uterus presses up on the stomach and pushes acid the same direction. That is why heartburn often starts in the second trimester and peaks in the third. It is uncomfortable but harmless to the baby, and it usually disappears after delivery.

The habits with the best payoff: eat smaller meals more often instead of large ones, stay upright for at least an hour after eating, and finish your last meal two to three hours before bed. Raise the head of your bed or use extra pillows so gravity works overnight. Skip your personal triggers, which are most often fatty or fried food, spicy food, chocolate, caffeine, citrus, and carbonated drinks. Wear loose clothing around your waist. These changes sound small but together they control most mild pregnancy heartburn.

Calcium carbonate antacids are generally considered the first choice in pregnancy, and alginate-based products that form a foam barrier are also commonly recommended. That said, check with your doctor or midwife before taking any medicine while pregnant, including over-the-counter ones, because your specific situation and trimester matter. Avoid antacids high in sodium and any product containing aspirin. Stronger medicines like H2 blockers and proton pump inhibitors are sometimes used in pregnancy when simpler measures fail, but only on your clinician's say-so. Do not take double doses of anything to chase relief.

The dangerous look-alike is preeclampsia, which can cause pain just below the ribs, especially on the right side, in the second half of pregnancy. Call your midwife or doctor the same day for pain below the ribs that comes with a bad headache, vision changes like blurring or flashing lights, sudden swelling of the face or hands, or vomiting in the second half of pregnancy. Also get checked for chest pain with shortness of breath, pain that spreads to the arm or jaw, trouble swallowing, black stools, or vomiting that will not stop. Burning behind the breastbone after a big meal, worse when you lie down, is heartburn. Pain that ignores antacids and comes with those other signs is not.

Almost always, yes. Pregnancy heartburn is driven by pregnancy hormones and the pressure of the uterus, and both are gone after delivery, so most people are back to normal within days to weeks. If heartburn keeps going or starts up well after pregnancy, that is ordinary reflux and worth its own conversation with a clinician, especially if it happens most days.

Yes. A remote clinician can confirm the heartburn pattern, screen for the preeclampsia warning signs, and advise which over-the-counter options fit your trimester and your other medications. Texting an AI doctor is a fast first pass when you are up at midnight with burning and want to know whether it can wait for your next prenatal visit. The red-flag combinations above are the ones that skip telehealth and go straight to a same-day call.