I get a similar sort of thing. Any day that I get up and I am belching and burping away, I know to just tear up my plans for the day. Apart from repeated bouts of diarrhea I will usually have a temperature and chills, pretty much nonstop nausea, and pains in my guts, usually of the "burning coal" (acute pinpoint) sort. I assume these are ulcers, they are usually concurrent with bright red blood in my stool, although I have had colonoscopies that have failed to spot any inflammation even when I am passing blood on a daily basis.
When I have these pains they are spectacularly painful when a bubble of gas passes over them, real break sweat and lean on something stuff.
The pains are situated in my LRQ (lower right quadrant), and slightly further up on both the LLQ and LRQ. My LLQ is usually distended in a very characteristic asymmetric shape.
Imagining the sigmoid colon (which is the bit of intestine directly leading to the anus) as being shaped exactly like the "S" on Superman's vest, I assume that I have active ulcers just below the first bend of the S, then above that as it curves back to the other side, and then just below the next bend.
The nausea, I was told by my GI, (who incidentally doesn't think I have Crohn's) is as a result of disruption to peristalsis. Instead of rhythmic ripples of muscle pushing food down the gut towards the anus, the contractions become irregular and may go in the wrong direction; nobody seems to know why. The medication I was prescribed was Buscopan, (hyoscine something or other, based on a plant extract from a bulb) which is an antispasmodic; the more common home remedy is peppermint tea, which I found had about
the same (weak) effect.
My theory is that the bacteria which are suddenly causing the active inflammation - I usually found it related to sugary foods and other not-on-the-menu items - are fermenting away, which would potentially cause lots of nasty toxic free radicals and the like, and that is what causes the gas. (Not usually smelly for me, ironically enough, until I eventually went onto probiotics I was literally someone whose **** didn't stink !
In my case a fart may be silent, but the only person it is likely to be deadly to is me, internally !)
Nowadays, I use probiotics and fasting to dampen down these problems, and within a day or two they usually die down. But of late that has been less reliable, probably because I got sloppy about
the probiotics and garlic that my nutritional therapist told me to take regularly.
Lovely disease, isn't it.
Guaranteed to make you feel like socialising !