Talk to Cancer Specialist / Oncologist on Oncologist Or Sugery

Assalamualaikum I have a Question??? Mere father ko Cancer rentum tha to Hum ne surgery krwai thi jis se un ma stoma bahar Nikal ke Colostomy bag laga dia hai 2.5 months ho gye surgery ko. Colostomy bag har 12 din bad change krty hen. Last time jab bag change Kia tha to stoma bilkul theek tha lekin jab kal change karny lagy to half side pe stoma bilkul theek tha lekin remaining half side pe stoma aur skin Mai Gap tha. Can anybody tell me is that normal? What is its reason and solution? Ke stitches Ka issue hai ya pakhany ki issue se gap aa gya hai between stoma and skin? I M Really depressed.