An aneurysm is a weakened area in the wall of a blood vessel that bulges outward. Many aneurysms cause no symptoms until they become large or rupture, which is why knowing warning signs can be important.
Signs of an aneurysm you should not ignore
Possible signs of a brain aneurysm
Most unruptured brain aneurysms have no symptoms, but some may cause:
- A sudden, severe headache (“the worst headache of your life”)
- Neck stiffness
- Nausea or vomiting
- Sensitivity to light
- Blurred or double vision
- A drooping eyelid or enlarged pupil
- Pain above or behind the eye
- Weakness, numbness, confusion, or trouble speaking
A sudden, severe headache with neurological symptoms can be a medical emergency.
Possible signs of an abdominal aortic aneurysm
Some abdominal aneurysms are silent, but possible symptoms include:
- A pulsing feeling or lump in the abdomen
- Deep, persistent pain in the abdomen or side
- Back pain
If an abdominal aneurysm ruptures, symptoms may include:
- Sudden severe abdominal or back pain
- Dizziness or fainting
- Rapid heartbeat
- Low blood pressure
- Feeling extremely weak or unwell
Possible signs of a chest (thoracic) aortic aneurysm
Possible symptoms include:
- Chest or upper back pain
- Difficulty breathing
- Trouble swallowing
- Hoarseness
- Cough
Seek emergency care immediately if you have:
- A sudden “thunderclap” headache
- Fainting with severe chest, abdominal, or back pain
- Sudden weakness, paralysis, confusion, or difficulty speaking
- Signs of shock (cold, clammy skin, severe weakness, rapid heartbeat)
Risk factors that increase aneurysm risk
- High blood pressure
- Smoking
- Family history of aneurysms
- Older age
- Certain inherited connective tissue disorders
- Atherosclerosis (hardening of the arteries)
Bottom line: Aneurysms can be silent, but sudden severe pain, neurological changes, or collapse should never be ignored. If you have risk factors or concerning symptoms, a healthcare professional can determine whether screening or further evaluation is appropriate.
