Stroke: A stroke is a medical emergency. When a person has a stroke, part of the blood supply to the brain is cut off or greatly decreased. There are two main types of stroke, ischemic and hemorrhagic. Stroke symptoms includes dizziness, sudden headache, weakness in an arm or leg on the same side, weakness in the muscles of the face, difficulty speaking, vision problems, and more. Treatment of stroke depends on the type and severity of the stroke suffered.