Dear Vish, Hello Allergy to cold result in bronchitis whenever there is change in season. There occurs constriction in your air passage, depending upon cold exposure, resulting in cough, which is usually dry in nature. Large bouts of cough can result in vomiting due to opening of Lower Esophageal Sphincture. You should take Antihistaminic after getting yourself full examined by a medical proffessional. Prevention from cold is beneficial. Following investigation will be helpful:- 1. CBC (Complete Blood Count) 2. Chest X Ray PA View. I Hope this will be of help to you. Thanks.