<human>:  What are the symptoms of a stroke?
<bot>: The most common symptoms of a stroke are sudden weakness or numbness in the face, arm, or leg, especially on one side of the body; confusion or trouble speaking or understanding; difficulty seeing in one or both eyes; difficulty walking, dizziness, loss of balance or coordination; and a sudden, severe headache with no known cause. It is important to seek emergency medical help immediately if any of these symptoms are experienced.