Hello, Thank you for asking at HCM. I went through your history and would like to make suggestions for you as follows: 1. I would suggest you regular levocetirizine + montelukast for at least 4 weeks. 2. I would also suggest you regular steam inhalation which will help in nose congestion symptoms. 3. For diagnosis of allergy, I would suggest you allergy testing for common air-borne allergens such as house dust mites, molds, pollens, insect proteins, animal dander, etc. This will help you identify substances you are allergic to and also to know the measures to avoid them. 4. Based on allergy testing, an Allergist-Immunologist may prescribe you allergen specific immunotherapy which works on immune system to gradually improve allergy symptoms over a long period. 5. In general, please avoid exposure to dusts, smokes and air pollution as much as possible. 6. Regular breathing exercises and healthy diet rich in vitamins & minerals will also help you in a long run by improving your lung capacity and immunity respectively. 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.