Hello, Thank you for asking at HCM. I went through your history and would like to make following suggestions to you: 1. First of all, diagnosis of allergy is very important. Dust contains many types of particles and the first step is to identify the particular article from dust that causes troubles to you. 2. For diagnosis, I would suggest you allergy testing for house dust mites, molds, common pollens in your region, insect proteins and animal dander (if you have contact with pets). This will help you identify the substances causing allergies and also to know the measures to avoid them. 3. Based on allergy testing, an Allergist-Immunologist may prescribe you allergen specific immunotherapy ( allergy vaccines ) which works on immune system and gradually improves your immunity towards that particular substance/s. This will improve your allergy symptoms. 4. Till investigations are done and immunotherapy becomes effective, I would suggest you regular intranasal corticosteroids for 14 days and combination of montelukast and fexofenadine thereafter. 5. In general, I would suggest you to avoid exposure to dusts, smokes and air pollution as much as possible. 6. Healthy diet and regular exercises are also very important for improving immunity. Hope above suggestions will be helpful to you. Should you have any further query, please feel free to ask at HCM. Wish you the best of the health ahead. Thank you & Regards.