First aid measures for sudden cerebral infarction include calling the emergency number, lying down with pillows removed, and keeping the airway open. 1. Call the emergency telephone: if there is a sudden weakness of limbs, numbness, slurred speech, suspected cerebral infarction, you should urgently contact 120, and send them to the emergency room for first aid. 2. Decollapse and lie down: the patient should not be moved at will, and should be placed on a hard bed to ensure the safety of the surrounding environment. 3. Keep the airway open: If the patient is unconscious, he should tilt his head to one side, take out his dentures, remove foreign objects from the airway, and loosen the collar and pants belt to keep the airway open and prevent aspiration. It should be noted that if there is dizziness, unresponsiveness, crooked mouth and other precursors of cerebral infarction, you should go to the hospital in time to prevent sudden cerebral infarction.