Thanks for choosing HCM.
You have not stated your age. Please start an exercise regimen in right earnest.
Generally there is midriff weight gain after age of 40 years if one doesn't exercise.
You may also have to look for certain foods which could be giving you bloating
& avoid them.
Take anti-Flatulent tabs available on the counter & try. If no relief, please get an Endoscopy
done after 2 weeks.