Overview
There are a number of types of allergies. Seasonal allergies to airborne molds and pollens are generally mediated by IgE and tested for using skin prick tests. Food allergies can be mediated by IgE, but more often are mediated by IgG and are best tested for using blood tests.
Food sensitivities are sometimes called "allergies" but are not really allergies. Instead, food sensitivities generally represent some blockage in a metabolic pathway that prevents the normal metabolism of some component of the food. Lactose intolerance is a common example of a food sensitivity.
Strictly speaking, allergies are not autoimmune disorders, since the target of the immune system is not part of the body ("auto-"), but rather is some exogenous substance. However, many of the same techniques are applicable to both allergies and autoimmune disorders.
Please see conventional, complimentary and alternative medical treatments for important background information regarding the different types of medical treatments discussed on this page. Naturopathic, Complimentary and Alternative treatments that may be considered include: