Massive headache while pregnant: what to know

Pregnancy can bring headaches through tiredness, dehydration, missed meals, stress, congestion or changes in usual routines. A severe or unfamiliar headache can also signal a pregnancy complication involving blood pressure, so its intensity and associated symptoms matter.

Record when the pain started, whether it built gradually or suddenly, and whether you have flashing lights, blurred vision, swelling, upper abdominal pain, breathlessness, fever, vomiting or reduced alertness. A cold, [COVID-19](/conditions/covid-19/) or [Dehydration](/conditions/dehydration/) may be relevant, but does not rule out another cause.

Contact your maternity team, obstetric clinician or urgent care service for advice rather than waiting for the headache to pass. Rest in a cool, quiet place, drink fluids if permitted, and eat a small meal if you have missed one.

Take medicines only after checking that they are appropriate in pregnancy and follow the advised dose. Avoid starting or combining headache remedies without guidance. Nasal congestion from [Allergic Rhinitis](/conditions/allergic-rhinitis/) or [Chronic Sinusitis](/conditions/chronic-sinusitis/) can hurt, but a massive headache needs separate attention.

Seek emergency help for sudden explosive pain, weakness, numbness, difficulty speaking, confusion, seizure, fainting, severe vision change, stiff neck, chest pain or breathing difficulty. Contact maternity services urgently for persistent severe pain, new swelling, upper abdominal pain or concerns about high blood pressure.

Do not drive yourself if you feel faint or your vision is impaired. Tell the clinician how far along the pregnancy is, what medicines you have taken, and whether the baby’s movements have changed.

Ask: Could this be related to blood pressure or another pregnancy complication? Should my blood pressure and urine be checked? Which medicine is safe for me? What symptoms mean I should return immediately?