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.
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.