question: Hello Sir, I am 35 yrs old and from last 15 days suffering from sneezing and blockage of nostrils. In a normal, one is open and other is block and it changes. but some time both is closed. I have started to take Celen (Vit. C) from today. I am allergic from dust. Sneezing is started when I get up after sleeping most of the time. Please tell me the medicine and other precaution for cure it.