Having cough since two weeks. But the cough is not all the day. It's just comes for some time and go away and again repeats. And no cough during nights. Not having fever. Rarely small yellow phlegm is seen. And sometimes nose get blocked. And there is a muscle growth in my right hole of nose and it's like dns. I used benadryl kuffdryl syrups but no change I seen what is the reason that my cough not going?