I had terrible mouth sores a when the RA caused me to have cancer, and it was awful. It took two weeks and medication to get rid of, and then my taste buds weren’t right for weeks. As for other skin issues I have to make sure to take very good care of my skin and keep it clean or I end up with some of the similar things that you talked of. For me, one of the worst spots is on the side of my nose, although it can be anywhere. Just know you are not alone! Keep on keepin’ on, DPM