Dear D.,
First of all, I can stay silent no longer. Please be very wary of this NAET therapy that keeps being propounded on this site. It's techniques have no basis in medical science and no objective research has ever been conducted or published on it. Thinking that chiropractic will change biology of the nature of allergy is 17th century thinking at best and life-threatening at worst.
Allergies in general are increasing, especially in the industrialized nations. No one is sure why, but one theory holds that we keep our homes and infants too clean, so that the immune system does not learn to recognize harmless from nonharmless allergens in the environment during infancy, when B-cells are under the process of habituation in the thymus. The part of the immune system that recognizes allergens (immunogloblin E or IgE)actually is part of the mechanism for recognizing and distroying large pathogens, such as parasites.
This is probably not the whole story, however, as allergies can arise during any time of life, and there is a definite genetic component to allergy. In the US, approximately 25% of the population has an allergy to a food, airborne allergen (such as dust mites, animal dander, pollen, etc) or metal.
Most allergic reactions are annoying, but not life-threatening. Typical responses to airbourne allergens are sneezing, runny nose, itching, watery eyes, and sometimes hives. We now know, BTW, that asthma is the endpoint disease associated within inhaled allergens, which, although controllable, can be debilitating and, in rare cases, fatal.
Food allergies can manifest in many ways. The most common are eczema, hives, and intestinal discomfort (gas, bloating, cramps, diarrhea). All of these symptoms are a response to the large amounts of histamines that the body makes as a response to the allergen. One potentially fatal response to histamine is what's called angioedema, which is a swelling of blood vessels. When this happens in the throat, tissues can get so swollen that the airway is blocked and the person can suffocate quickly. Another severe response is anaphyllaxis. When this occurs, the blood pressure suddenly drops and the circulatory system can collapse quickly, causing heart failure and death. Very typically, angioedema and anaphyllaxis occur together.
Now, this is why you need to be very careful around someone with an allergy to a food like peanuts. Some people are so sensitive that they will have a severe allergic reaction if they come in contact with even the tiniest amount of allergen by eating it, getting it rubbed on their skin, or inhaling it. My daughter has a very severe peanut allergy. She cannot eat any peanut products, cannot use makeup or lotions made with peanut oils or emolients, and cannont be within at least 5 feet of someone eating peanuts, because chewing them releases dust into the air. She carries benadryl and 2 epipens with her at all times and wears a medical alert necklace. Earlier this year, she had to be rushed to the emergency room because a classmate next to her unzipped a pencil bag and pulled out a peanut. The peanut dust that was in that bag was stirred up from the removal of that single nut and was enough to elicit a severe reaction. Her throat swelled up, she was covered in hives, and was on the verge of anaphyllaxis by the time she used the epipen. (Flying on a plane is a special challenge -- the flight crew cannot serve packaged peanuts and has to inform everyone on the plane to not eat peanuts that they might have brought with them because of the danger from peanut dust circulating through the ventilation system.)
If there is a child in your son's class with a peanut allergy, please take it very, very seriously. Even if no one food shares with him, the dust they release by opening a container of peanuts or eating nuts can affect him severely. If another child eats a PB sandwich and touches a doorknob, they can leave enough molecules of the allergen on the doorknob that it can cause an allergic reaction in the sensitive child if he touches it. With little kids, you can't rely on their handwashing habits to keep the other child safe. Even casual contact with someone who's eaten peanuts can cause a reaction. A couple of years ago, a 17-yr old girl died after she kissed her boyfriend on the lips after he had eaten some peanuts. Clearly, accidental exposure poses very great risks. In a school environment, this is unacceptable. And, it's not right to ask the child to be home schooled. They have to be able to live in the world like anyone else, and need to learn how to do so safely as they mature.
BTW, if you have an opportunity to talk to the other child's parents, ask them if they have talked to their child's allergist about omalizumab (Xolair). This is an IgE inhibitor and it can protect the child against accidental exposure to peanuts up to the equivalent of eating 9 peanuts.
OK, how many flames will I get about my comments on NAET?