Causes
A brain aneurysm forms when a blood vessel wall in the brain weakens and bulges out like a balloon.

This weakness can develop due to several reasons:
- High Blood Pressure
- Family history of aneurysms
- Older age
- Smoking
- Head Injury
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What Is
A brain aneurysm (also called a cerebral aneurysm) is a weak or thin spot in a blood vessel in the brain that bulges out and fills with blood. It often looks like a balloon or a small berry hanging on a stem.
What Are
A brain aneurysm forms when a blood vessel wall in the brain weakens and bulges out like a balloon.
What Are
Various factors can increase the risk. Individuals at higher risk typically include:
Some people are born with small defects in their artery walls, which can develop into aneurysms later in life.
Women are more likely to develop brain aneurysms than men—possibly due to hormonal effects on vessel walls.
Until a few years ago, the only available treatment for an intracranial aneurysm was open surgery. This involved opening the skull and placing a specially designed surgical clip at the base of the aneurysm to cut off its connection from the main blood vessel. While effective, this procedure is highly invasive and carries significant risks especially when the aneurysm is located in a delicate or hard-to-reach area. The risks increase further in elderly patients or those who are semi-conscious or in critical condition.
In the late 1990s, a breakthrough treatment called “coiling” was introduced for brain aneurysms. In this minimally invasive procedure, a thin tube (catheter) is inserted through a small puncture in the leg similar to an angiography and carefully guided through the blood vessels using advanced X-ray imaging until it reaches the aneurysm in the brain.
Once in position, the aneurysm is filled with very fine, soft platinum coils that block blood flow into the sac, preventing further bleeding. In some cases, a stent (a small metal mesh tube) may be placed to help support the coils and keep them securely inside the aneurysm.
This entire procedure is performed under general anesthesia to ensure the coils are placed with high precision and safety.
Patients usually stay in the hospital for several days, depending on the severity of the initial bleed. It may take a few days for the brain to recover fully.
About 20% of patients may develop vasospasm, where brain vessels temporarily narrow due to irritation from leaked blood, possibly leading to stroke. This is treated with angiography and medication. Some may also develop hydrocephalus (fluid buildup in the brain), which may require a drainage tube.
What Is
Stroke is brain dysfunction due to problem of blood vessel of brain.
What Are
Various factors can increase the risk. Individuals at higher risk typically include:
Damages blood vessels over time.
Narrows blood vessels and increases clot risk.
Can raise blood pressure and trigger arrhythmias.
Leads to plaque buildup in arteries (atherosclerosis).
Contribute to high BP, diabetes, and cholesterol.
A special medication is given through a vein to dissolve the clot. It is most effective within 4.5 hours of stroke onset. Beyond this window, the risk of complications increases and benefits reduce.
A minimally invasive angiographic procedure where the clot is physically removed using a catheter inserted through a small pinhole in the groin. This is typically used for large vessel blockages, especially when the injection alone isn’t effective. It can be performed up to 24 hours after stroke onset, but earlier treatment is crucial—as the clot hardens and brain damage progresses, the benefits of opening the vessel decrease significantly.
All stroke patients require medical treatment to prevent future strokes and support recovery. This includes medications, as well as physiotherapy and rehabilitation to regain strength and function.
Treatment for a hemorrhagic stroke (bleeding in the brain) depends on the size and location of the bleed.
Small hemorrhages may not need active surgical treatment and can often be managed with close monitoring, medications to control blood pressure, and supportive care.
Larger bleeds can increase pressure inside the brain, which may be life-threatening. In such cases, neurosurgery may be needed to remove the blood clot (clot evacuation) or relieve pressure on the brain (decompression surgery).
Stroke recovery depends on the type, severity, and how quickly treatment begins. Many patients recover partially or fully with early medical care, physiotherapy, and rehabilitation.
Yes. Many unruptured aneurysms don’t cause any symptoms and are often found during scans for unrelated issues.
No. But a ruptured brain aneurysm can cause a hemorrhagic stroke (bleeding in the brain). Not all strokes are due to aneurysms.
Yes. Controlling blood pressure, avoiding smoking, and managing stress may reduce the risk of aneurysm growth or rupture.