I too itch at the stoma site occasionally but no pain. Never new why? J pouch surgeries 2014. It doesn't last so I wasn't concerned. I also had hernia reconstructive abdominal surgery in 2019 where they used mesh. I itch at times all over abdomen. I thought I was getting a allergic reaction. This comes & goes. Less over time. Thankful it's not unbearably uncomfortable. I can live with it.