Answers:
It can do, when it is associated next to gas surrounded by the digestive system.
Basically, if you hold gas contained by the digestive system, when you metamorphose altitude the pressure change so that the volume of the gas get larger or smaller - smaller as you moderate altitude, larger as you increase altitude.
This can affect the amount of pressure on the bin liner of the digestive system - any the stomach or roomy intestine typically - and this can exact more or smaller quantity twinge.
Also, increase pressure in the digestive system can exact more reflux - this is when the stomach contents 'overrun' fund into the oesophagus (or gullet), and this can also worsen indigestion.
Hope this help.
Absolutely. When I trained as a pilot- we have to munch through specialised food containing ingredients that would not do excess stomach bloating and gas.
It can be a immensely serious problem within unpressurised cockpits.