Vasculitis often presents skin issues. I am in a vasculitis group on Facebook for my vasculitis and I often see people posting about splotches, rashes, etc. I would definitely see a doctor to confirm though. Autoimmune conditions are very serious and can cause lots of complications if left untreated (I have two autoimmune diseases that were diagnosed way after having symptoms for extended periods of time).

It's a small hives that flares for 10 minutes and gone, but recurring in the same spot looking the same. Vasculitis treatment includes immosuppressants that I'm already on 🤷‍♀️