Severe and sudden headache is the major symptom of a ruptured aneurysm. Other common signs are nausea, vomiting, seizure, loss of consciousness, blurred or double vision.
There are some cases where an aneurysm may secrete a small amount of blood. This may cause a sudden and very intense headache. Often, a more severe rupture follows the leaking.
Typically, an unruptured brain aneurysm may not cause any symptoms, especially if it’s a small unruptured aneurysm. However, a large unruptured aneurysm may apply pressure to brain tissues that can cause a widening of the pupils, change in vision or double vision, and pain above and behind one eye.
According to Dr. Carlos Francis A. Santiago of Makati Medical Center Department of Neurological Sciences, aneurysms can be treated even if it hasn’t ruptured or causing a problem yet. It’s better to be safe than sorry.