I just realized this could be related to autoimmune.
For years now I have gotten a rash, not under my arms where you apply deodorant, but around that area, spreading out a bit but not all over my trunk. It starts the second day of traveling and doesn't go away until I'm home a couple of days. We always drive and spend a lot of hours on the road. It doesn't itch so I just ignore it.
Anyway, my rheumy always asks if I've had any rashes and I always say no (we haven't taken a long trip the last couple of years). I think I'll tell him about these episodes.
Has anyone else experienced this?