Hello, thanks for vising the H.C.M.C.
In our surrounding there are thousands of allergen present such as mite ,dust,powder,smoke, fume ,spray,pollen etc etc.
In such type of atmosphere it is not possible for a person to remain aloof from these things.
produces congestion in the breathing area of lungs that's why lumen of alveoli becomes narrow hence there is difficulty in breathing.
Stuffy nose, sneezing
,whistling sound from mouth and nose are the some common complaints we have to face.
If attack of allergen is more severe than there is breathlessness.
Any how in such type of conditions you have to avoid allergen if possible.
Bronchodilators are the best treatment after the advice of doctor.
Good luck. Dr.Het.