Fainting sudden asphyxia, the severity of different, its first aid methods are different, as follows: 1, if the patient is clear, you can use the Heimlich maneuver, the rescuer will be the left hand into a fist, the eyes of the fist inward placed between the patient’s navel and the rapier protruding, the right hand wrapped around the left hand fist, from the back of the patient, upward and backward force impact on the patient’s abdomen, so that the asphyxiating material from the respiratory tract to spit out; 2, If there is a consciousness disorder, you should determine whether the patient still has a heartbeat and breathing, if there is a heartbeat and breathing, you should place the patient on the flat side to prevent asphyxiation, and lift his chin to open the airway, if there is no heartbeat and breathing, you should immediately perform cardiopulmonary resuscitation, and at the same time, call the 120 emergency telephone for more help.