Hello, Donna. Thank you for posting, and happy holiday. I'm sorry that your dad has been having so much difficulty.   This forum is dedicated to information and concerns related to inflammatory bowel disease (IBD). Though you haven't indicated that your father was found to have Crohn's disease or ulcerative colitis, I'm guessing that you are writing because, frequently, people with severe and/or complicated IBD require ostomies, and you're looking for, perhaps, an ostomy tie-in to his present problems.   It seems from what you've written that the most recent surgery was at least a few months ago; well, I get the sense that enough time has passed that your father has fully recovered, surgically. So, I will assume that the nausea is not related to pain medication that was prescribed post-op. Is there some other new medication? Other than that, I can not suggest what might be causing his complaints, as I don't see them related to the colostomy.   OstomySupport.org ( www.ostomysupport.org )is an organization that you and your father may find helpful.   My best, Hope