Stroke is caused when there is a disturbance in the blood supply to the brain. It can occur due to various reasons and the person becomes unconscious. It is treated as a medical emergency and can cause permanent damage to neurological system which sometimes results into death.
The symptoms of the stroke depend on the area of the brain affected. As in most cases, there are no physical injuries, identifying a stroke becomes difficult. From the below link, find out the symptoms and ways to identify a stroke.