Sorry to hear about your butterfly rash which is a nuisance. I have all of the symptoms of Lupus SLE, including other auto-immune diseases (Sjogrens syndrome, hypothyroidism, fibromyalgia etc) and the rash is dreadful.
When I first approached the GP he took one look and said 'lupus'! However the blood tests keep coming back negative leaving me in limbo. The rheumatologist says the butterfly rash is photosensitivity and it is treated by using factor 50 suncream together with steroid cream. The doctor will prescribe steroid cream for the outbreaks if you approach him together with something like Epaderm. They won't prescribe the lupus medication without a positive ANA blood test, which is a problem with the many of us who don't test positive but have all of the symptoms. Hope this helps you. --Feline