Put an organic cleanser on your face to remove any more make-up that may still be deep in your pores. Leave make-up off of your face until the rash disappears.
Throw away the old make-up and any brushes that you used in th e make-up. Stop weraing makeup till your rash clears. If you must use a disposable sponge.
When you have a face rash, keep your face clean, try a topical ointment and if the condition has not cleared up after a few days visit a dermatologist.