Headaches in Pregnancy: Common Causes and Warning Signs
Key message: Headaches are common in pregnancy, especially early on, but a new severe, persistent or unusual headache—particularly…
Key message: Headaches are common in pregnancy, especially early on, but a new severe, persistent or unusual headache—particularly after 20 weeks or with visual, neurological or blood-pressure symptoms—needs prompt assessment.
Get urgent help: Seek urgent maternity or emergency care for a severe or sudden headache, blurred vision or flashing lights, weakness or numbness, difficulty speaking, confusion, seizure, fever with neck stiffness, head injury, very high blood pressure, severe pain below the ribs, breathlessness or reduced movements.
What common factors can trigger a headache?
- Hormonal change, tiredness or poor sleep.
- Dehydration, missed meals or vomiting.
- Caffeine withdrawal or excessive caffeine.
- Stress, muscle tension, eye strain or sinus symptoms.
- Migraine, which may improve, persist or change in pregnancy.
- Anaemia, infection, high blood pressure or another medical condition.
What simple measures can help?
- Drink regularly and eat small balanced meals.
- Rest in a quiet dark room and use a cool or warm compress according to comfort.
- Keep sleep and caffeine patterns regular.
- Use gentle neck and shoulder movement and reduce prolonged screen strain.
- Record timing, severity, triggers, associated symptoms and medicines used.
Which pain relief is usually considered?
Paracetamol is generally the first-choice pain medicine in pregnancy when taken at the recommended dose and for the shortest necessary time.
Do not start ibuprofen, aspirin-dose painkillers, codeine combinations, migraine tablets or herbal products without pregnancy-specific advice. Low-dose aspirin prescribed to prevent pre-eclampsia is a different treatment and should not be changed independently.
What about migraine medicine?
A preconception or early-pregnancy review should assess preventive and attack medicines. Some patients can continue or use selected treatments, while others need a safer alternative.
A migraine history does not make every new headache a migraine. A change in pattern, neurological symptoms or a first severe headache needs evaluation.
Why is headache important after 20 weeks?
Pre-eclampsia can cause severe or persistent headache, visual disturbance, upper-abdominal pain, sudden swelling, vomiting or feeling very unwell. Blood pressure and urine/blood tests may be needed.
A normal previous blood-pressure reading does not rule out a new problem.
Which other diagnoses may need urgent review?
- Stroke or a blood clot in the brain, especially with neurological symptoms.
- Meningitis with fever, neck stiffness or marked light sensitivity.
- Carbon monoxide exposure when others in the same place are also unwell.
- Severe dehydration or infection.
- Post-dural puncture headache after spinal or epidural anaesthesia, usually postpartum and worse when upright.
When should I arrange a non-emergency review?
Arrange review for headaches occurring repeatedly, requiring frequent medicine, disturbing sleep, associated with vomiting or new after the first trimester. Blood pressure, anaemia, eyesight, migraine treatment and other causes can be considered.
Avoid taking pain medicine on many days without review because medication-overuse headache can develop.
Frequently asked questions
Is paracetamol safe?
It is generally first choice at the recommended dose, but persistent pain still needs assessment.
Can I take ibuprofen?
Do not use it without pregnancy-specific advice, especially later in pregnancy.
Does every headache mean pre-eclampsia?
No, but severe or persistent headache after 20 weeks needs blood-pressure and symptom assessment.
Can pregnancy improve migraine?
It improves for some people and persists or changes for others.
Should I check blood pressure at home?
Home readings can be useful if the device and cuff are appropriate, but symptoms still need clinical assessment.
Your next step
Mention recurrent headaches at antenatal visits and keep a brief diary. New severe headache, visual change or neurological symptoms require urgent assessment rather than routine messaging.
Medical and content review: Dr Mohamed Abdelghany, Obstetrics & Gynecology Specialist, MRCOG (UK), MSc Obstetrics & Gynecology – Kasr Al-Ainy, Cairo University.
Last reviewed: 23 August 2026.
This information is for general education and does not replace individual medical assessment. Severe, sudden or concerning symptoms should not wait for a routine appointment.
