The malar rash can begin as a flush to the cheeks after you've been in the sun. The more you're outside in the sunshine, the worse it is even to the point of becoming raised and really red. I don't know if it ever becomes permanent. I do know if it's just the flushed pinkness on your face, if you use sunscreen 45spf or higher, a broad brim hat, long sleeves and long pants, and avoid the sun from about 10am to 4pm in the warm and hot weather, you'll look better and feel SO MUCH better.
For some reason, the sun intensifies the fatigue, aches, and bother of lupus. Go figure.
Wishing you well - Barbara