Hi, first of all try to avoid every exposure to dust and fumes, you can use some air filter face mask when you are out of home, avoid home dust exposure also. try to avoid dry atmospheric condition and drink a lot of water to faccilitate mucocilliary movement. for the time being you can take some anti allergic drugs like levocetrizine, montelukast or sodium chromoglycate but later on go for complete allergen test and then you can consult an immunologist for desensitisation therapy.you can also use bronchodilator inhaler like asthalin for bronchospasm. take care.