Hi I'm not sure if I'm posting in the right place!

 hi everyone.  I'm posting to try and get some help and advice for my brother.  He was diagnosed with bowel cancer about two and a half years ago.  He has had his bowel removed (has a stoma).  Unfortunately the cancer has spread to his liver.  Recently he's been experiencing a lot of pain (possibly trapped wind) in the area around the stoma and says the pain is excruciating.   He says the pain is like a pulsating one and the area under his stoma gets quite hot and tender .

We've tried peppermint tea, laxatives eliminating food from his diet that sort of thing but just wondered if anyone else has experienced anything like this.... Is this normal and the body's way of processing and digesting food  

Is there anything in particular that could set this off?  I'm thinking of hidden ingredients that may trigger off a pain spasm ?

Could the stoma be changing shape .. I'm sure I've read that is could happen  he has had scans and we don't thing (fingers crossed) 

He's been admitted to hospital a few times because of the pain and given morphine but I get the impression that he was just fobbed off a a bit 

Thank you for reading and sorry for such a long post X