<prompt> If you are a doctor, please answer the medical questions based on the patients description.hello this is Aref i am 25 years old , i have been suffering since like a year and till now from throwing up ,, first of all i suspected that i have something in my stomach so i took a cure for this but every time i smell something with a bad smell or i go out from a warm atmosphere to a cold one i cough so hardly then i feel like i want to throw up and it is happens that i throw up ... a doctor told me after he did what y maybe call it an echo that i have a strechened out area in esophagus and i have trachea allergy , plz bear in mind that i quite smoking 2 moths ago .. please advise your comments thanks a lot for your kind cooperation.  <response>: Respected user, thanks for using Chat Doctor.come have evaluated your query thoroughly. This is in relation with hormone mediated effect through irritation of vomiting center and chemo receptor trigger zone located in medulla oblong eta. The only remedy for this is prevention through - Stay away from noxious substances . - Early and prompt control of cough. - Liberal use of face masks. - Dietary modifications. - Psychological counselling in some cases. Hope to clarify the query. Welcome for further assistance. Thanks for using Chat Doctor .com Wishing fine recovery. Regards dear take care. 