Dyspnea During Pregnancy: What to Know

Pregnancy increases the body's demand for oxygen and changes how the chest and diaphragm work. As the uterus grows, movement may feel harder, especially during activity or later pregnancy. Breathlessness that builds gradually and settles with rest can fit this pattern. Reflux, indigestion, anaemia, asthma, infection, or anxiety can also make breathing feel uncomfortable. Indigestion may cause upper abdominal pressure or burning that is mistaken for chest or breathing trouble; learn more about [Indigestion](/symptoms/indigestion/).

A clinician may ask when the symptom began, whether it occurs at rest, and whether you have pain, fever, wheezing, cough, dizziness, or palpitations. The assessment may include listening to your lungs, checking oxygen levels, and reviewing your pregnancy and medical history.

Pause strenuous activity, sit upright, loosen tight clothing, and breathe slowly. Move at a comfortable pace and rest between tasks. Keep antenatal appointments and mention persistent breathlessness, reduced exercise tolerance, or symptoms that are worsening. Do not start medicines, including reflux treatments, without checking that they are suitable in pregnancy; your clinician can discuss [Acid Reflux Medication](/treatments/medical-management/acid-reflux-medication/) when relevant.

Seek emergency help for severe or rapidly worsening breathlessness, breathing difficulty at rest, blue or grey lips, fainting, confusion, or sudden chest pain. Get urgent assessment for coughing blood, one-sided leg swelling or pain, a high fever, or new wheezing. These features can signal a problem affecting the lungs, heart, or circulation and should not be attributed to pregnancy without assessment.

Ask what could be causing your pattern of breathlessness, whether you need checks for anaemia or asthma, which warning signs matter for your pregnancy, and which medicines are appropriate if reflux or another condition is contributing.