What are the danger signs of stroke? The following phenomena may be the precursors of a stroke, so come to the hospital as soon as possible! 1. sudden onset of symptoms; 2. loss or blurring of vision in one or both eyes; 3. staring to one side with both eyes; 4. rotation of vision or impaired balance 5. numbness or distorted corners of the mouth on one side of the face; 6. slurred speech, gibberish or difficulty in understanding language; 7. weakness, clumsiness, heaviness or numbness of one limb (with or without the face); 8. severe headache or vomiting, which were rarely seen before; 9. the above symptoms with unresponsiveness, impaired consciousness or convulsions. ”Time is brain”, the earlier the clear diagnosis, the earlier the treatment, the better the treatment effect.