why do people faint even they do not have any healty problem

Question: why do people faint even they do not have any healty problem

Asked by 225bm1926 to Grace on 2 Jun 2019.
- Grace Kago answered on 2 Jun 2019:
  
  hmm..I guess there are situations where someone can faint even though they aren’t ill.. like for example if someone is dehydrated, or scared?
  I think irrespective of the reason why someone might faint, there’s often a medical explanation for the things that happen to our bodies (even if the reason is sometimes really hard to figure out, but there’s always an answer!)

Question: why do people faint even they do not have any healty problem