Sydelle,
I have never had a rash, but you have to use the adhesive remover prep and clean the area around the stoma with it, then wash the area good with ivory soap ( you can't use soap with any oil or moisturizer in it), rinse real good with with clean water and dry area. Then use the stoma adhesive powder and wipe area around the stoma with skin prep this seal the pours of the skin when you are changing the bag this should prevent this from happening.
Gene