Welcome to NeuroTalk:

As a mother, I certainly can understand your concern! That is alot on his plate, and he is rather young to understand it all!

Has he been evaluated for Crohn's disease?

With all that GI stuff going on, nutrients are probably lacking
as a result. Not eating or vomiting alot, they can get skewed pretty quickly.

First off have him add epsom salts to the bath when he soaks.
6-8 oz in a tub lukewarm water. This will provide lost magnesium, and this may help the leg pain some.

Does anyone in your family have pernicious anemia or neuropathy in the hands or feet?

Low B12 can occur in young people with poor diet or genetic or autoimmune damage to the cells in the stomach making intrinsic factor.
Here is a very good video illustrating how sneaky low B12 can happen to different types of people:
http://www.youtube.com/watch?v=BvEiz...ature=youtu.be
Also once tested you have to make sure the doctor interprets the results properly... many still say "normal" when in fact low is being reported. The NEW acceptable low today is 400pg/ml.

Bruising can be from low Vit C intake, or from autoimmune vasculitis. Has he traveled abroad lately, or has he had alot of vaccines all at once? Vaccine injury can resemble autoimmune disease and/or trigger it.

If you can find a holistic or integrative doctor for him, he might get better diagnositic evaluations.

A really high white count can come from GI infections, and a gall bladder inflammation or an obstruction of the intestine can provide really high white counts. Also chronic appendicitis can be missed this way. Crohn's, etc.

It sounds like he needs a new doctor.