What is the best allergy treatment to fight severe pollen allergies?

See an allergists: In general, the treatment of allergic rhinits is three pronged: avoidance, medications and immunotherapy. Avoidance implies getting tested to understand what one is allergic too. Medications include: antihistamines, decongestants and nasal steroids. Immunotherapy is allergy vaccine therapy which, while woking to control you symptoms, is trying to establish a long term modification of one's allergy.