What are some symptoms of a brain aneurysm?

Symptoms of an unruptured brain aneurysm include blurred vision, a severe headache, dilated pupils, neck pain or a change in speech, according to WebMD. Symptoms of a ruptured aneurysm occur suddenly and may include fainting, seizures, light sensitivity, nausea and vomiting in addition to neck pain and a severe headache.

Many small, unruptured aneurysms have no symptoms, according to the Brain Aneurysm Foundation. A large aneurysm may press on nerves or the brain to cause symptoms. Headaches associated with aneurysms often cause sudden severe pain unlike any previous headache, states Mayo Clinic. Any of these symptoms either alone or together should receive medical attention immediately.