After coughing cerebral ischemia loss of consciousness, mainly and cough symptoms are more serious, but also does not rule out and cerebrovascular disease. For the existence of upper and lower respiratory tract infections caused by coughing symptoms patients, may be in the coughing symptoms are more serious, will cause cerebral ischemia and hypoxia, resulting in insufficient blood supply to the brain oxygen supply, and then produce loss of consciousness fainting symptoms, mainly related to the primary disease. Some patients, such as the existence of cerebrovascular disease, such as atherosclerosis, cerebral infarction, etc., gradually make the cerebral blood vessels narrowed, so when the patient coughing, cerebral ischemia and loss of consciousness symptoms. Therefore, when a patient suffers from lack of oxygen in the brain caused by coughing, he should go to the hospital as soon as possible, and cooperate with the doctor to clarify the cause of the cough and then treat the cause of the cough.