If you suddenly find someone fainting, you should immediately make the patient lie down and pat him or her to see if he or she is conscious. If there is no consciousness, you should immediately call 120 to request medical assistance. At the same time to touch the patient’s carotid artery, observe the chest there is no undulation, if both are not, breathing, heartbeat has stopped. Should immediately give cardiopulmonary resuscitation, chest compressions and artificial respiration alternately, first give 30 times of chest compressions, and then give 2 times of artificial respiration, so that the operation of 5 back and forth. Then stop for a moment to quickly determine whether the respiratory heartbeat has recovered, if not, continue the above operation until the paramedics come. If the patient fainted after breathing, heartbeat is still there, you can first give the patient to keep warm and then pinch the manzhong point under the nose with your fingers, there are openings to promote the role of wakefulness, and then wait for medical personnel to help.