Hello there...indigestion and gastritis might be the cause for your problem..other possible causes are,renal stones,constipation,pancreatitis, mesentric lymphadenitis etc... It may be muscular as well... So cause must be evaluated in detail...consult nearest surgeon for clinical examination and for investigations like ultrasound abdomen and pelvis etc...Consult them they will do the needful.

Just shows u have a weaker digestion.Eat what u can digest..Make sure u have clear bowels..otherwise u will have anal irritation.Eat fibrrich fuds esp lady finger, radish,cucumber etc.Reduce oily stuff..eat in time ..sleep well. Reduce stress.Do regular exercises..Sometimes 'gas'formation becomes integral. Don't bother.Eat dinner bfr 7.30pm.So much to tell.Gas/flatulence has no permanent cure..Eat slowly with closed mouth.U cannot try Tab SOOKTYN 2 tabs after food 2-3 times a day. (Ayurveda tabs)