How to solve residual urine sensation

Hello, I am a man in my mid-50s.

For several years, I've been feeling residual stool and discomfort after bowel movements. I haven't been very satisfied with the relief, so I took medication before my colonoscopy, thinking that one colonoscopy would resolve the issue, but the residual sensation remains.

I've never had surgery or constipation before, so why might this be happening? For your reference, I prefer vegetarian food over meat, and I have a slim build at 183/66. If anyone has good advice, please let me know.

I can't even share my feelings with others and live feeling uneasy, so my work efficiency is low. Please give me some good advice.