Hello. Thank you for asking at HCM. It is very important to know what kind of allergy problems you have, i.e., nose symptoms, skin symptoms, food allergies, etc. However, I assume you are having nose allergies. (it is the most common form of allergy). I would suggest you to take montelukast and levocetirizine. For identification of allergens, I would suggest you to consult an Allergist-Immunologist who will ask you in very detail and may suggest you allergy testing. Most of nose allergies are due to aeoallergens (allergens in air), so it is not so easy to identify them. The common aeroallergens are house dust mite, molds, pollens, animal dander, cockroach and other insect allergens, etc. As general, avoidance of dusts, smoke and air pollutants will help you improve your nasal allergies over a long run. Hope this will be helpful to you. Wish you the best of the health. Regards.