Food allergies can start at birth or at any later age.
They may cause a visible external rash or internal effects that are difficult to analyze. In extreme cases, they can cause a life threatening anaphylactic shock requiring emergency expert treatment. As you will learn from the writer's problems discussed below, food allergies are highly variable in their effects and in most cases require very individualized treatment that sometimes amounts to a special research program for each patient. There is a severe shortage of doctors with the expertise and patience to treat a difficult case. So, the best course of action is to do everything in your power to avoid food allergy problems.