Hi welcome to HCM... Salmeterol rotacap you are using can be taken for bronchoconstriction but you ate doing wrong thing by taking it without advise from any consultant... Here according to your history asthma has to be ruled out first.... For that spirometry done for pulmonary function test.... If asthma found source of allergen searched for by allergy test... Try to avoid exposure to dust , pollen , environmental pollution and smoking less.... If repeated attack you can be given maintainance inhaler of formeterol and budesonide in low dose with regulat monitoring of peak flow.... Cut the ginger into pieces then add it into boiling water , steep for few minute , cool it and then water can be drinked...is good remedy.. Consult pulmonologist for your proper respi examination...including auscultation Also. Take care... Dr.Parth