I'm new to this but a dermatologist thinks that I have cutaneous lupus. My skin is extremely sensitive to sunlight and comes out in raised up patches. Sunlight also seems to trigger lots of other lupus like symptoms - joint pain, tiredness, headaches - but my blood results for SLE are negative. My headaches do not respond to regular pain killers, but seem to respond to anti inflammatories. Is it possible to have lupus and negative blood results?