Evidence-informed content. Review status is maintained by the editorial team.
Pregnancy hormones relax the muscle between the stomach and oesophagus, while the growing uterus increases pressure on the stomach. Acid can then move upward and cause indigestion or heartburn.
Overview
Pregnancy hormones relax the muscle between the stomach and oesophagus, while the growing uterus increases pressure on the stomach. Acid can then move upward and cause indigestion or heartburn. Experiences vary, and this guide provides general education rather than an individual diagnosis. A maternity professional can interpret symptoms in the context of gestation, medical history and examination.
Causes
The underlying cause of Heartburn in pregnancy is condition-specific and can involve pregnancy hormones, placental development, infection, nutritional demand, changes in circulation or an existing health condition. It is rarely helpful to assume that ordinary behaviour caused the problem. A clinical assessment is needed to distinguish expected pregnancy changes from a condition that needs treatment.
Risk factors
Risk is influenced by the particular diagnosis. Relevant factors may include previous pregnancy history, age, family history, multiple pregnancy, existing medical conditions, medicines, infection exposure, nutritional status or previous uterine surgery. Having a risk factor does not mean the condition will occur, while having no recognised risk factor does not exclude it.
Signs and symptoms
Burning behind the breastbone, an acidic taste, burping, bloating, nausea or food coming back up may occur, often after eating or when lying down. The absence of a typical symptom does not rule the condition out, and symptoms shared with ordinary pregnancy changes still deserve review when persistent, severe or unusual.
Diagnosis
Typical symptoms are diagnosed clinically. Persistent, severe or unusual pain may require assessment to exclude heart, gallbladder, liver or pregnancy-related conditions. Tests are chosen for the individual situation; not every person needs every investigation, and some results need repeating as pregnancy changes.
Treatment options
Smaller meals, avoiding personal triggers, remaining upright after eating and elevating the head at night may help. A clinician or pharmacist can advise on pregnancy-compatible antacids, alginates or acid-reducing medicine. Treatment decisions should account for gestation, severity, other health conditions, preferences and local maternity guidance. Do not stop prescribed treatment or start a medicine or supplement without appropriate advice.
Home care
Follow the agreed maternity plan, keep appointments and record symptoms or measurements only when the care team recommends it. Regular fluids, balanced meals, rest and comfortable movement may support general wellbeing but are not treatments for every condition. Ask before using non-prescription medicines, herbal products or high-dose supplements during pregnancy.
Prevention
Not every case can be prevented. Early antenatal care, recommended screening, vaccination before pregnancy where appropriate, management of existing conditions, avoiding smoke and attending promptly when symptoms change can reduce some risks or allow earlier treatment. Prevention advice should be tailored to the specific diagnosis.
Possible complications
Possible complications depend on severity and timing and may affect the pregnant person, placenta, fetal growth, timing of birth or recovery after delivery. Listing a complication does not mean it will happen. Monitoring is designed to identify change early and guide proportionate care.
When to seek medical care
Urgent assessment is needed for crushing chest pain, breathing difficulty, fainting, vomiting blood, black stools, severe pain below the ribs, severe headache or sudden swelling. If symptoms feel life-threatening, contact local emergency services. For non-emergency concerns, use the maternity, early-pregnancy or primary-care service appropriate to the stage of pregnancy.
Frequently asked questions
Does this condition always affect the baby?
No. Risk depends on the specific condition, timing, severity and response to care. Many pregnancies progress well with appropriate monitoring. Ask the maternity team what the findings mean in this individual pregnancy.
Can I manage this without professional care?
Practical self-care can support comfort, but it cannot replace assessment when symptoms are persistent, severe or associated with pregnancy warning signs. Treatment and follow-up should be individualised.
Will I need extra appointments?
Possibly. Additional blood tests, scans, blood-pressure checks or specialist visits depend on the diagnosis and clinical course. The care team should explain the purpose and timing of any extra monitoring.
Summary
Heartburn in pregnancy can range from a manageable pregnancy concern to a condition requiring specialist care. Knowing the characteristic symptoms, attending assessment and acting promptly on warning signs supports safer care. Individual advice should come from a qualified maternity professional.
References
OUR REVIEW PROMISE
Evidence-based, clearly reviewed.
Healthier Baby Today articles are reviewed for accuracy and updated as guidance changes.
Last updated: July 17, 2026
