Good morning julianatheory151 ...
I do not know exactly what type of irritation you are having but I have had great success with the following:
I use Perfect Choice barrier rings ... they cause no reaction from my skin and I have absolutely no leaks.
Next -- I actually use Lotrimin powder and crust that around my stoma and the skin where the adhesive from the wafer goes. It is the best for any yeast that may grow and cause skin irritation. It cleared up any irritation I had completely.
I have an ileostomy and am coming up on my 2-year "stomaversity". I started using the Perfect Choice Rings not long after I got my ileostomy (maybe 3 months post surgery) and have had no issues with leaks whatsoever since then. My wear time is quite long, in fact I make myself change just to let the area breathe.
The Lotrimin along with the crusting with the Cavilon wipes (or spray) has alleviated just about any irritation ... occasionally there will be a small amount right around the stoma but that is usually when I have waited too long to change my appliance and there has been a tiny, tiny bit of leakage around that area.
Hope this helps. Let us know how you are doing!