A stroke occurs when there is a blockage or narrowing of a blood vessel in the brain, or when a blood vessel bursts and causes bleeding into the brain. Immediate medical attention is necessary, similar to a heart attack. Brain cells can die due to lack of oxygen and nutrients, or from damage caused by bleeding. While some brain cells die rapidly, others can remain in a compromised state for hours. Strokes can result in permanent brain damage within minutes to hours. Prevention and treatment options are available, such as lifestyle modifications and regular medical care. These measures can help prevent stroke and reduce the risk of other conditions such as dementia, heart disease, and diabetes.