My son is 12 years old and he has been suffering from severe problems of nasal blockages since past 5 years and more. His nasal block starts usually when he stays indoor and especially in every evening, irrespective of seasons. He always breathes through his mouth and also associated with symptoms of asthmatic attacks recurring since when he was 3 years of age and was prescribed to continue to take budecort and Duolin inhaler. His allergies were examined but of no improvement. Doctors had suspected his nasal defects and some tests like CT scan of nasal cavities were done but nothing abnormalities could be detected. We have no pets. We stay in an airy apartment with sufficient openness although usual city pollution is there. We usually change the liveries in every week and use pillows of synthetic Creon. We desist my son to take milk products viz milk, cheese, butter, ghee etc. Chocolates are strictly prohibited to him. He is very thin and underweight and having very low appetite. Began to pant on any arduous job like climbing stairs, running for a short distance. I am in much distress and please help.