Sir, I myself am a doctor. I am suffering from allergic reaction whenever my skin is exposed to sun. I was examined and was diagnosed with Photodermatitis. So are there any effective medication that can help me to reduce the itching. Also I would like to know the precautions to be taken. The sunscreen of Nevia helps a bit. But that too is not much effective. Please provide me with the precautions and medications that can be used by me. Thank you.