When ever I take a large gulp of water I can feel it going down my throat and into my stomach. Suddenly as i am breathing normally a bad smell araises from what i think is my stomach. I sense the smell when I exhale. It stays for a little while and then goes away until i take another gulp of water. Until now i dont notice it when i drink anything else. Only with H2O. This is something thats been happening to me recently. How come???
HI. The smell which you are getting from the abdomen while Chat Doctor.  Another reason :This is called Foe tor in medical language. You have a history of blockage of one nostril. SO this can be Due to Chronic Sinusitis, the sinus can have pus which gives you the feeling of Weird smell. I would advise you to have a consultation with an ENT Surgeon, get Clinical examination done; CT scan of the Sinuses and an X-ray of the chest is mandatory. Get the treatment according to the reports. IF the CT scan is normal we can consider the possibility of a problem in the Sensory System and you may need an opinion of a Neurologist.