A stroke occurs when the flow of oxygen-rich blood to part of your brain is interrupted or blocked, depriving brain tissue of oxygen and nutrients. Within minutes, brain cells begin to die.
If brain cells die or are damaged because of a stroke, symptoms occur in the parts of the body that these brain cells control. Examples of stroke symptoms include sudden weakness; paralysis or numbness of the face, arms, or legs (paralysis is an inability to move); trouble speaking or understanding speech; and trouble seeing.
A stroke is a medical emergency. Prompt treatment is crucial. Early action can minimize brain damage and potential complications.