I'm sorry you are experiencing your first Lupus rash! Ugh! Here is some basic information on Lupus rashes and how to treat them -- https://lupus.net/symptoms/rash. Also, one of our contributors shared her experience with Lupus Malar and shared some treatment tips at the end of the piece -- https://lupus.net/living/malar-rash. Also, there are a number of community member comments at the end of the article, so you may glean some good tips there as well.
I hope this helps and I hope the rash goes away quickly!