ive recently noticed that when seeing an body injury or blood or things that look very severe make me breathe heavier, I get a full body heat flash and start to sweat but its not really hot but it feels like my body is on fire. It has lasted up to seven minutes before but then after I stop seeing or thinking about it Im fine.  One time I was having one of these heat flash things and I stood up and walked to try to get rid of it but it only felt like I was being pushed down and my body just some how sat down and layed itself down. When my head touched the ground I did not even realize I was laying down and I stood back up and my body cooled down and I felt normal.                       Some symptoms of these are:I start to breath heavyMy eyes get a little blurryI feel like I weigh a ton when I stand upand I feel pressure below the cerebellum on the back of my neck and in my heart.Its something that Ive never experienced before and its okay once it is over.Im a 14 year old boy  if that helps. Could this be fainting?
The medical term for this is vasovagal syncope (also called neurocardiogenic syncope). This is essentially your mind reacting to something that it does not like and causing your body to experience these symptoms.