Shea butter is great for POD, but the trick I found it to get a very thin layer on the irritated parts of my face. After washing my face with a mild soap, I do the following: take a grain-sized piece of unrefined shea butter, put it on the palm of my hand, use a finger to rub it around my palm with a little warm water. This spreads the shea butter around pretty thinly, so there's just a slick, slightly wet layer on my palm. Then I take a cotton ball, moisten it with warm water, and rub it across my palm to get a coating of shea butter on the cotton ball. Then I dab the cotton ball on my face to get a very thin layer of shea butter spread around, putting more of the shea butter on the cotton ball as I continue to dab. Then just let it dry, should feel slightly moisturized. This doesn't irritate my skin at all, helps nourish it back to a healthy feel.
This worked way better for me than the topical antibiotic Rx from my doctor, my experiments with apple cider vinegar, or anything else. The shea butter has soothed the perioral dermatitis irritation and redness, and generally made my skin feel a lot better.
I have battled with Peri oral dermatitis for the past twenty years. I have tried it all Apple cider Vinegar, Green tea which seemed to work but it's actually time consuming. The simplest form of treatment is 100% organic shea butter.