When patients with cerebral infarction experience vomiting, at least the following situations should be generally thought of: 1. Infarction in the brainstem, cerebellum and other parts of the brain, i.e., the area of blood supply of the posterior circulation, the patient is often accompanied by dizziness, unfavorable activities, etc.; 2. Massive cerebral infarction is often accompanied by swelling of the brain tissues, and the brain tissues can be shifted to the contralateral side of the cranial pressure when the swelling is severe, and the patient will experience projectile vomiting. This situation is more critical, need to apply dehydrating drugs, such as mannitol, glycerol fructose, furosemide, etc., this situation must be in the hospital by a specialist to guide the treatment.