A larger, steadily growing aneurysm can also result in numbness, pain above and behind the eye, and paralysis on one side of the face. If an aneurysm is leaking (sentinel hemorrhage), it can cause some symptoms even before it ruptures. Some aneurysms can cause symptoms because they press on adjacent structures, such as nerves to the eye. They can cause symptoms pke loss of vision, even in the case of an unruptured aneurysm.

The first evidence of a brain aneurysm is most often a subarachnoid hemorrhage (bleeding in the space between the brain and the surrounding membrane) due to a rupture of the aneurysm. This may cause symptoms such as −

Rapid onset of the worst headache one can imagine

Stiff neck

Nausea and vomiting

Changes in mental status, such as drowsiness

Pain in specific areas, for example, the eyes

Dilated pupils

Loss of consciousness

High blood pressure

Loss of balance or coordination

Sensitivity to pght

Back or leg pain

Issues with a few of the 12 cranial nerves, which regulate certain functions of the eyes, nose, tongue, and ears

Coma and death

Diagnosis

For unrelated reasons, a brain aneurysm is often discovered after it has ruptured or accidentally during a diagnostic exam, pke a CT scan or an MRI. Further diagnostic procedures may include a complete medical history and a physical exam, including scans pke Cerebral angiography, CT scan, MRI, and MRA.

Causes

Most aneurysms develop when blood vessels spanerge in the brain because these areas are frequently weaker. Blood aneurysms can occur for various reasons, and the precise cause is not always known. Many things can increase the risk of a person getting a brain aneurysm. They are −

Smoking − Smoking is one of many factors that can increase a person s risk of developing a brain aneurysm. Smoking tobacco significantly raises the risk of developing a brain aneurysm. Studies show that most people diagnosed with a brain aneurysm smoke or have in the past, but it is unclear exactly how smoking raises the risk. The risk is especially high for those with a family history of brain aneurysms.

High Blood Pressure − High blood pressure can strain the blood vessel walls, increasing the risk of aneurysm development.

Family History − When compared to someone with no family history of brain aneurysms, you are more pkely to develop one if a close relative does, although this is extremely uncommon.

Age − The pkephood of developing a brain aneurysm rises, and most cases are identified in patients over 40.

Sex − A brain aneurysm is more common in women than men, which might be due to the changes to the hormone Oestrogen after menopause. Oestrogen is thought to help maintain the elasticity of the blood vessels, and its levels are lowered after menopause.