An aneurysm (a weakened, bulging blood vessel) can be silent for a long time, but when it becomes dangerous—especially if it leaks or ruptures—there are warning signs you should not ignore.
Possible warning signs (depend on location)
Brain aneurysm (intracranial)
If it leaks or ruptures, symptoms can include:
- Sudden, severe headache (“worst headache of my life”)
- Blurred or double vision
- Drooping eyelid or unequal pupils
- Pain above or behind one eye
- Numbness or weakness in the face or one side of the body
- Difficulty speaking
- Loss of consciousness or seizure
A small “warning leak” (sentinel bleed) may cause:
- Sudden unusual headache days or weeks before rupture
- Neck stiffness
- Nausea or sensitivity to light
Aortic aneurysm (chest or abdomen)
Symptoms can include:
- Sudden, intense chest, back, or abdominal pain
- Pain that feels tearing or ripping
- Shortness of breath
- Dizziness or fainting
- Rapid pulse or low blood pressure (in rupture)
Peripheral aneurysms (arms/legs)
- Pulsating lump in limb
- Pain or tenderness near the lump
- Coldness or numbness if blood flow is affected
Important point
Many aneurysms cause no symptoms at all until rupture, which is why they’re often discovered incidentally on scans.
If someone has a sudden severe headache, collapse, or severe chest/back pain, that’s an emergency—treat it as urgent and seek immediate medical care.
If you want, I can also explain risk factors (like high blood pressure, smoking, genetics) or how aneurysms are detected before they become dangerous.
