Hi my son is 12, since the age of he has quiet a lo of fainting eposides everytime i took him to the docter and hospital they could not find the cause and said it is due to dehydration then at the age of 10 he fainted quiet a couple of times durings the yr took him hospital and did the necessary test on the brain etc, the docter could not find anything but gave me an explaination saying his inner body is hotter then the outerbody , and when he doing sports etc his oxygen level does not reach his brain and he faints and this should go when he gets older hmmm now he is 12 between 10 to 12 he has few eposides then last week Mond he came home saying mum not feeling well had bit of chest pain (been coughing) and felt fainting, He then had high temp and took him to the docter who said he has got flu, been weak did not go to school eventually went to school today last day of term and he fainted in class saying he felt hot took off his sweater and he collapsed. Now what could this faint be??