Why can't I gain weight after colon surgery?

Weight changes after colorectal surgery can be challenging, and it's completely understandable to have concerns about this several months post-surgery. Surgery in this area can indeed affect how the body processes and absorbs nutrients, which may impact weight gain - this is something worth discussing with your medical team who can evaluate your specific situation and provide personalized guidance about nutrition and recovery.

I think a lot depends on how much bowel they removed. I've read about "short bowel syndrome" which is exactly what you're asking about. I'd check in with your gastro doc. It may just take time. Good luck.