Hi I'm 25 with no cardiological or pulmonary history.  From last 7 days I'm facing air hunger, It's like my feel my lungs are not getting enough air so that I've to take More air by a deep breath from my nose or mouth. In winter usually feel suffocated in closed rooms or sometime when my noses are block. But now in open place or clear nostril I feel air hunger specially when I concentrate at my breath. I don't have any other symtom, but after taking long breath 6 to 7 time I feel uncomfortable or a tightness in my chest mussel.