Hello sir, my age is 23 and I do not feel hungry even, my stomach is clean. I do not have constipation and I do not have any digestion problem, whatever I eat it gets digested but main problem is that I never get hungry, I just forcefully take my food, but the main problem which I feel always from upper left side of my stomach, I always feel heavy on this side and all day and night I keep doing burping and while burping some times small pieces comes to my mouth and I feel sour in taste. please help me sir. I have taken many gas releasing tablets but nothing worked on me.