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.
Unruptured brain aneurysms are typically asymptomatic because they are small in size, according to the Brain Aneurysm Foundation. Because of their small size and lack of symptoms, many unruptured brain aneurysms are discovered during tests for unrelated conditions, says WebMD. However, symptoms such as localized headache, difficulty speaking, sudden vision problems, or numbness and paralysis are signs of a brain aneurysm and need to be carefully evaluated.
A brain aneurysm is an abnormal bulge or weakness in the wall of an artery that supplies blood to the brain, notes WebMD. When a brain aneurysm ruptures, blood is released into the brain, which can lead to stroke, brain damage or death. Hemorrhaging in the brain is called a subarachnoid hemorrhage, which causes sudden and severe symptoms, reports the Brain Aneurysm Foundation. Symptoms of a ruptured brain aneurysm include extremely severe headache, nausea and vomiting, seizure, double or blurred vision, confusion and a loss of consciousness, according Mayo Clinic.