I got my colostomy this past May due to diverticulitis that caused sepsis. They removed some colon and intestine, but the surgeon said in February of next year I'll get a reversal.
Since then, I've tried to adjust to pooping out of my colostomy bag, but last night, I felt the urge in my rear end and had to go. Sat on the toilet and pooped. I wiped and there wasn't much on the toilet paper, but it was a weird consistency. I looked in the toilet and it wasn't much but was completely white-colored.
I called the surgeon today, concerned and worried, and the nurse told me not to worry about it. Completely normal. She said it was material (not waste) that had built up in my intestines that were unaffected. She said she's seen this before a lot. In short, she said I'll be fine.
Didn't want to gross anyone out with my description, but to let others on here know if it happens to them, don't worry.