On exposure to the allergen, an Immunologic (IgE) or a non-immunologic reaction is
set in process, which
ultimately releases histamine, which
acts at the peripheral receptors, resulting in allergic reactions and rashes.
The aim of the therapy is identification and removal of trigger factor. It is the most important and the only effective long-term therapy. Since you are already aware of the triggering factors, avoid them or desensitize yourself with the help of an allergy specialist.