aneurysm affects nearby structures.

These symptoms can also be caused by other conditions, so they do not automatically mean someone has an aneurysm. Still, sudden or unusual neurological symptoms should not be ignored, especially if they are new, intense, or worsening.

When Symptoms Become an Emergency

The most dangerous situation is a ruptured aneurysm. A sudden, severe headache is one of the most important warning signs. Some people describe it as the worst headache they have ever experienced. Other emergency symptoms may include nausea, vomiting, stiff neck, sensitivity to light,