Occasionally I Have Been Getting A Rash Or Have Had

Occasionally I have been getting a rash or have had chaffing issues between my upper thighs and in my but cheeks. Usually it's after bad diarrhea (and I understand how it causes it in that scenario) or after a high physically strenuous day. But today after a concert where I did a lot of sitting while waiting in line a lot of standing and moving to the music, but not dancing, and then a mix between sitting and standing after. I had no diarrhea and my activity wasn't that strenuous, but the rash/chaffing between my buttcheeks is more painful than it has ever been. Thoughts? I already use wipes and bring them with me, but should I be putting a powder of some kind on every night?