Does he use a cell phone or cordless phone? And is he living or schooling close to a cell phone or wifi tower or antenna?
www.antennasearch.com
The radiation emitted by these technologies destroys the immune system. What you described with your son was exactly what happened to me when 3 antennas were installed on a water tower up the street from me. Me and my pets all became chronically ill - many of my pets died.
By the way, you can google this for yourself, but leukemia has already been linked to exposure to electromagnetic radiation (from power lines, for example). Just imagine what these cell phone and wifi towers/antennas are doing to us. The lymph nodes in my groin and neck began swelling when these antennas were installed.
Audio Archives - Audio Interviews with Top EMF Researchers:
http://electromagnetichealth.org/audio-archives-and-more/#pa
Attitudes to the Health Dangers of Non-Thermal EMFs:
http://www.powerwatch.org.uk/news/20080117_bevington_emfs.pd
Bioinitiative Report:
http://www.bioinitiative.org/report/index.htm
Urge Congress on EMF Safety:
Broadband - A Public Health Hazard: