What are the precursors of a stroke?

Before a stroke occurs, patients usually have some aura symptoms, such as transient weakness or numbness of one limb, transient numbness of one side of the face or crookedness of the mouth; transient slurred speech or difficulty in understanding language; transient double gaze to one side; transient loss or blurring of vision in one or both eyes; transient impaired consciousness or convulsions; transient dizziness and headache, etc. These symptoms are likely to be transient ischemic attack. However, there are also patients who may suddenly develop a series of symptoms of cerebral infarction or cerebral hemorrhage without any symptoms. These precursors of stroke should be treated promptly by a doctor.

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