Avoiding contact with known allergy triggers such as pollen, dust, mold spores and animal dander is an important first step in the treatment of having too much histamine, Mayo Clinic states. Taking an antihistamine drug to alleviate allergic reaction symptoms may also be beneficial.
To avoid exposure to airborne allergens, maintain a low level of humidity in the home, replace carpets with hardwood flooring, frequently wash bedding and regularly use a vacuum with a HEPA filter. A doctor can recommend allergen immunotherapy for relief from severe allergies. In case of anaphylaxis, individuals can inject themselves with an emergency epinephrine shot pending emergency treatment, says Mayo Clinic.