The fainting is called loss of consciousness. The person may lose consciousness at any age due to any disease.
If you saw in the street a man lying on the sidewalk, walk up to him. Remember that fainting may disguise a deep sleep due to alcohol intoxication. Smell of exhaled human air: if it is filled with vapors of alcohol, so you are not dealing with swoon and deep sleep.
But if you met on the street a person is really unconscious, first check it for the presence of breathing and pulse. If he is not breathing or has no pulse, immediately call an ambulance, call for help and begin to carry out a complex resuscitation.
If there are signs of life (breathing and heartbeat) try to bring the person to life. If you have access to ammonia, hold the cotton wool to his nose, to give to inhale the smell. Sprinkle the face with cold water. It should be simple pure water, without gas and mineralization. If you are near a pharmacy, unable to call for help of the pharmacist - in case you are not a doctor, surely he will be qualified and will be able to help the victim more wisely.
If a person fails to put in themselves for a long time, call an ambulance. Before arrival of a brigade of doctors are close to the victims.
If the person on the background of loss of consciousness, there are cramps, in any case can not interfere with twitch. This could result in injury. Ensure that the patient bit his tongue, and that he inadvertently injured. In this case, calling an ambulance is required. The dispatcher, who will you call, be sure to tell all the symptoms that you observe.
The reasons for the loss of the consciousness of a great variety due to diseases, tension, emotions etc. In all cases, the victim must go to the clinic at the place of residence and consult a therapist about the incident.