You are suffering from allergy which can present in many forms and in your case it is in the form of Allergic Rhinitis
. First of all you should avoid dusty, smoky atmosphere and strong smells as much as you can. Take antihistaminics like cetrizine or allegra or loratadine
. Also take montair 10 mgm once a day, fluticasone nasal spray
1 squirt per nostril twice a day. Avoid junk food and foods and drinks with strong flavours and artificial colouring agents and preservatives. Go out in the fresh early morning air and do some deep breathing exercises.