There are three causes of respiratory distress after cerebral infarction: 1, lung infection: especially when large cerebral infarction or brainstem infarction, it will lead to patients with impaired consciousness, sputum excretion and weakened coughing, which can easily lead to choking and coughing, resulting in patients prone to aspiration pneumonia or fallen pneumonia. After pneumonia arises, there will be a large amount of sputum in the lungs, accompanied by airway spasm, resulting in respiratory difficulty.2. Posterior fall of the tongue root: Patients with cerebral infarction who have impaired consciousness or have severe cerebral infarction will cause patients to have posterior fall of the tongue root, which will directly block the airway and cause obvious inhalation respiratory difficulty. 3.Central respiratory failure: If the patient’s cerebral infarction is serious, resulting in the involvement of the respiratory center of the patient’s central nervous system, central respiratory failure can occur directly, resulting in respiratory dysfunction of the patient and the need to use a ventilator to assist breathing.