If I have gas in my intestines, why does it hurt?
The mayo clinic has a lot of words, that describe the how and why you get gas.
Anything that causes intestinal gas or is associated with constipation or diarrhea can lead to gas pains. These pains generally occur when gas builds up in your intestines, and you're not able to expel it. Most people pass gas at least 10 times a day.
There are a few answers at Methods for dealing with gas pains? talking about how to get rid of gas.
But why do some, health people feel pain when they have gas? I can't imagine the gas bubble has a sharp point, so it's not like the gas bubble is poking your intestine.
Pain is "An unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage." so some mechanism must be turning the physical presence of gas in the intestine to pain. What is that mechanism?
Clarify: this question is about a healthy persons normal daily gas causing occasional pain.