Stroke is a medical emergency that occurs when blood flow to the brain is disrupted, leading to a sudden loss of brain function. It can result from a blockage in a blood vessel (ischemic stroke) or bleeding in the brain (hemorrhagic stroke). Symptoms may include sudden numbness or weakness in the face, arm, or leg, difficulty speaking or understanding speech, severe headache, and dizziness. Immediate medical attention is crucial to minimize brain damage and improve outcomes. Treatment options include clot-busting medications, surgical interventions, and rehabilitation. Preventive measures such as managing blood pressure, maintaining a healthy lifestyle, and addressing risk factors like smoking and high cholesterol can significantly reduce the risk of stroke.