Thought I'd share my experience of treating ostomy issues since 2011. You need to keep the hair from around your ostomy when it gets to a certain length that it's in your way. I did use an electric razor, but my advice would be not to do that. Nothing creates ingrown hairs quicker than electric razors. I now use a disposable razor, but am very careful not to nick anything, especially the stoma. From my experience going through wound care a few years ago, I know many of the products used for treating oozing, seeping sores near the stoma. First, I use a barrier wipe with alcohol. The ones without alcohol take forever to dry and do nothing to cleanse your skin. I use them to wipe the ingrown hair/pimple area. As you know, these sores, when under a barrier, can get ugly quickly. You need something between them and the barrier/flange. I recently had a very bad sore right below my stoma with only 1/4" between it and the stoma—this is a bad situation because you have very little surface to prevent leakage right onto the sore, and you don't want that. In that situation, I used a piece of Puracol folded for double thickness over the oozing wound, and on top of that, a low-profile piece of Duoderm with a sticky backside to hold it in place and protect the sore.
Some swear by Puracol Plus with silver, but my skin never reacted well to the silver, so I use plain Puracol. Duoderm comes in a variety of types, but for these types of small sores, I like the low-profile Duoderm with the sticky back, which can be used to create a sort of Puracol 'bandaid'. You cut everything to the size you need. Both the Duoderm and Puracol frequently come in 4 x 4-inch packages, and you will get lots of use from just one pack of those. It's sometimes easiest to cut both the Puracol and Duoderm to size with the Duoderm slightly larger than the Puracol, then put them together before placing them on the sore as a bandaid over the sore.
For very small places like this, I have occasionally got away with just putting a tiny piece of tissue on it, but when I have anything bleeding, even if it is tiny, I place a little piece of Puracol on it to protect it from the barrier/flange. For small issues, I don't use the Duoderm, but just place a small folded piece of Puracol on the sore to have something absorbent and that keeps the barrier from direct contact with it.
What I'm talking about here are the periodic issues you have with issues under the barrier/flange, not large wound areas or rashes. And this is not medical advice, just tips I know from over 8 years of dealing with skin issues.