Trapped intestinal gases can cause severe pain. When is this the case?

Question

Question ATPL - Airline Transport Pilot license - Human Performance and Limitations

QuizVDS · Accepted Answer

More frequent when flying above 18 000 FT in a non-pressurized aircraft.

QuizVDS · Answer

At lower altitudes.

QuizVDS · Answer

Only in pressurized aircraft when flying at higher flight levels.

QuizVDS · Answer

During descent as well as during climb, when the cabin pressure altitude exceeds 2 000 FT

Id 131 - ATPL - Trapped intestinal gases can cause severe pain. When is this the case?