Most unruptured brain aneurysms do not cause any symptoms. A large, unruptured brain aneurysm may press against brain tissue and nerves. The pressure on the brain creates symptoms such as double vision, paralysis or weakness on one side of the face and pain around the eye, reports Mayo Clinic.
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.