it depends if they have just fainted or if they are going to be out for a while, it also depends on the situation. If the person faints you should rub their hands and arms and try to get circulation running. also they should be on a relatively flat surface and after they wake up, give them some food. Nothing too heavy, maybe something like crackers, and also something to drink. Something that has suger in it so that their glucose levels will stabilize.
If they are unconscious and breathing, nothing will happen. If they are unconscious and not breathing, they will die.
breathing
Could be. Breathing is not a response. A person who is unconscious would be unresponsive and still breathing.
CPR should be performed if a person is unconscious and not breathing
Up to (but no longer than) 10 secs
To check for a response from an unconscious person, start by gently tapping their shoulder and asking loudly, "Are you okay? Can you hear me?" If there is no response, try to assess their breathing and pulse. If they are not breathing or do not have a pulse, begin CPR and call for emergency medical assistance immediately.
Rescue breathing is typically used when a person is unconscious and not breathing adequately or at all, regardless of whether they have a pulse. If the person has a pulse but is not breathing, rescue breaths can help provide oxygen to their lungs. However, if there is no pulse, cardiopulmonary resuscitation (CPR) should be initiated, which includes chest compressions along with rescue breaths if trained to do so. Always prioritize calling emergency services in such situations.
If a person is unconscious and electrocution is suspected, first ensure the scene is safe and turn off the source of electricity if possible. Call emergency services immediately. Check the person's breathing and pulse; if they are not breathing or have no pulse, begin CPR. Do not touch the person until the source of electricity is completely turned off to avoid becoming a victim yourself.
First perform an Initial Assessment. Open the airway, Check for breathing, if there is no breathing give two rescue breaths. If the rescue breaths go in and make the chest clearly rise check for a pulse. IF there is no pulse begin CPR.
So you don't stop breathing even when you are asleep or unconscious.
When a person has stopped breathing and can not breathe on his own, rescue breathing (or Mouth-To-Mouth Resuscitation) is given to try and saved the persons live (in addition to CPR and/or defibrilation).
Passed Out But You Are Still Breathing