Thanks for writing in.
There are several disorders which can cause fainting
in children. This could include arrhythmias, seizures, problems in the heart like coarctation of aorta or a hypertrophic cardiomyopathy
or simply a hot shower. It is good that you are keeping him hydrated, but to take this further, I would like to know whether an echocardiogram
has been done for him. If not, please get it done. An echocardiogram is an ultrasound
of the heart which allows us to look at the valves and the chambers of the heart. If this is normal, we can be sure that there is nothing wrong with the structure of the heart.
The possibility of seizures also needs to be evaluated. Ask your son if you can tell when he is going to faint. If he can, there is a chance that he has a complex partial seizure
. we would need an EEG to find out whether he is actually having these seizures.
Hope this helps.