What happens when you faint?!

Well you're standing in a room and suddenly you don't feel so good, you feel dizzy and light headed and need to sit down. You get very tired, time and everything else seems slow and distant and you feel like your burning, but at the same time shivering. By this time your eye sight is being consumed. You see colors in your peripherals and as the colors consume your vision it gets a lot darker. The next thing you know your lying on the floor.

It's an extreme drop in blood pressure
It's because you're not getting enough oxygen

experience

really if your writing this story in your characters point of view all you need to write is that your chacracter fainted and woke up later. but let me just tell you. this happens to the loss of a sufficient amount of blood loss and oxygen symptoms that can lead to fainting are dizziness, a dimming of vision, or brown-out, tinnitus, and feeling hot. Moments later, the person's vision turns black and he or she drops to the floor (or slumps if seated in a chair).

Factors that influence fainting are taking in too little food and fluids, low blood pressure, hypoglycemia, growth spurts, physical exercise in excess of the energy reserve of the body, and lack of sleep. Even standing up too quickly or being in too hot a room can cause fainting Recommended treatment is to allow the person to lie on the ground with his or her legs a little elevated. As the dizziness and the momentary blindness passes, the person may experience visual disturbances in the form of small bright dots (phosphene). These will also pass within a few minutes. If fainting happens frequently, or if there is no obvious explanation, it is important to see a doctor about it.

More serious causes of fainting include cardiac (heart-related) causes such as an abnormal heart rhythm (an arrhythmia), where the heart beats too slowly, too rapidly or too irregularly to pump enough blood to the brain. Some arrhythmias can be life-threatening. Other important cardio-vascular conditions that can be manifested by syncope include subclavian steal syndrome and aortic stenosis.

ok that should be enough info.

Funnily enough, I think if you are singing you are less likely to faint as you are controlling your breathing and it is lack regulation of oxygen to the brain that makes you faint.

OK, so I've done it a zillion times. You feel hot. You can't hear anything clearly and it all sounds distant. I don't see any black dots before I faint, and I'm not aware of anything other than feeling sick, incredibly hot, unable to concentrate, sound becoming more distant, breathing very shallow... lights out.

When you come back, you feel great!

You get raped by the nearest Republican.