Last December I fell something was blasting in my stomach and then I fell burning in my chest as well as in my stomach. I visit to hospital where doctors says it's gas no need to worry. Also my right side of stomach chest as well as my back was paining. After when I discharged from hospital in midnight I fell very uncomfortable and fear. Then I go to HYDERABAD for treatment in ASIAN INSTITUTE OF GASTROENTEROLOGY. Where my endoscopy is doing blood test and chest X-ray. Doctors see the report and tell me that it's gas no need to worry. In January I visit to Hyderabad. But after April I fell stomach pain bloating and acidity sometime. Why? I was a very heavy smoker but I quit smoking in march. Is this happening due to quitting smoking or anything else? Please tell me is this normal or anything else? Two times my endoscopy is done but report is normal. I only take pentadoc tab. Then why I fell stomach pain, sometimes acidity, rarely chest pain and bloating. I am heavy smoker but in march 2017 I quit smoking is there is any problem related to quitting smoking? I am very thankful for doctors giving me suggestions, reason and how I recover from this?