I was recently diagnosed with polymorphous light eruption after a biopsy was taken of an itchy, painful blister-like bump I had on my arm. I have had these off and on since last winter. I am a 64 yr. old female. I am following my dermatologist's instructions: using 100% sunblock for UVA & UVB rays, wide brim hat, long sleeves, pants, shoes/socks whenever I am outside. I am to try to avoid being out betwee 10-5 each day. I have been doing what he says and after 2 wks. of this, I am still breaking out. I get a few of these same bumps sprinkled over different areas of my body. I have a steroid cream I was prescribed and it helps, but can not figure out why I am still breaking out if I am following orders.