Everything is normal on lying down or in sitting position but as I stand straight my upper stomach feel tight and heavy even after very clear motion every day (no constipation at all). My local doctor suggested me ultrasound, endoscopy, ct scan but everything is normal in that report. Is this ibs or anything else?? Plz give any solution. Also suggest me any exercise if required * other than walking. Note:I have no symptoms in stomach like pain, constipation, burning sensation, vomit feeling etc. Note:I am experiencing 24/7 bloating in upper stomach only in standing* position from last one year. Also I am not on any kind of medication.