Hi: Yes, your son may very well be allergic to something he eats or touches.
My suggestion to you is that you visit NAET.com, order and read the book "Say Good-Bye to Children's Allergies" and make an appointment to consult with a doctor who is NAET certified. I go to Dr. David Karaba in Fullerton and absolutely love him. His phone number is ###-###-####. One of the wonderful things about NAET is that for children or the infirm, they can be treated through a surrogate, i.e., you. Here is the description paragraph from the book information.
"Say Good-bye to Children’s Allergies
By - Devi S. Nambudripad, D.C., L.Ac., R.N., Ph.D.
Paperback-1st Edition 2000
350 pages, 8.5’ X 5.5’ X .75’
ISBN: ISBN: 0-###-###-####-8-4
In Say Good-bye to Children’s Allergies, Dr. Devi S. Nambudripad, the developer of NAET®, will help you understand your child’s illness and will assist you in finding the right help to achieve better health for your child. This book will show you how certain commonly used products in your foods and environment can cause health problems in your child; how you can test your child in your privacy of your own home using the Nambudripad’s Testing Techniques described in the book. This book will educate you how your child’s health problems can relate to allergy, a traditionally under-diagnosed or misdiagnosed condition; and, how allergies can manifest into myriad symptoms that might seem unrelated. The author also provides remedies for mild conditions of common childhood ailments arising from allergies and how to find help in assisting your child find the right help for serious problems such as, asthma, hay-fever, common colds, sinus problems, milk allergy, peanut allergy, sugar allergy, hives, gastritis, vomiting, colic for newborns, ear infections, irritable bowel syndrome, colitis, bronchitis, drug reactions, and many other conditions. Dr. Nambudripad explains how allergies are often the underlying causes to pediatric problems and how NAET® testing procedures and NAET® treatments can offer relief from these allergies. The book is supported by NAET® practitioners’ testimonials and patients’ success stories."