Overview
Many brain aneurysms never burst. Burst aneurysms cause bleeding around the brain.
An aneurysm is a weak bulge in a brain artery.
If it bursts, it causes a sudden, severe headache.
Symptoms
Common signs:
- Sudden worst headache of your life
- Stiff neck
- Passing out
Less common
- Vomiting
Look up a symptom: Headache
When to get medical care
Causes
Weak artery.
Does it spread or run in families?
- It isn't contagious. You can't catch it from someone else.
Who is more likely to get it
- Smoking
- High blood pressure
Diagnosis
This is diagnosed in the emergency room or hospital.
The exam
A physical exam.
Tests
Tests, if needed:
- CT:
Treatment
Emergency care is needed. While waiting for help:
Self-care
- Call 911
- Control blood pressure
Prevention
To lower your risk or prevent problems:
- Don't smoke
- Limit alcohol
Which doctor treats this
- Emergency doctors treat it first, in the ER.
- They may send you to a neurologist (brain and nerve doctor) or a neurosurgeon.
Back to school, work, or sports
- Recovery time varies. Ask your care team when you can drive, lift, work, and exercise.
Children, pregnancy, and older adults
- Families: Some need screening.
Pregnancy and breastfeeding
- If you're pregnant or planning to be, tell your prenatal provider about this condition.
- Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
- Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
- Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.
For caregivers
- Go to visits when you can and take notes.
- Keep a list of medicines, allergies, and doctors in one place.
- Learn the warning signs that need fast care.
- Learn CPR. Many hospitals and the Red Cross offer classes.
- Take breaks and ask for help. Caregivers need care too.
Outlook
Fast treatment improves survival.
Getting ready for your visit
Bring a list of your symptoms and medicines.
What to bring
- A list of your medicines and supplements
- Notes on when symptoms started and what makes them better or worse
Questions to ask
- What follow-up care do I need?
- How can I prevent this from happening again?
Research studies
Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.
Search ClinicalTrials.gov for studies on Brain aneurysm or brain bleed
Sources
Last updated 2026-11-12.