Dear Friend Welcome to Health care magic. I am Dr Charu , I will shortly try to help you with my opinion. Kindly tell me the is the lesion itchy? What cream you have already applied? are they photosensitive? such red rash on dorsa hands can be due to many reasons like fungal infection, allergic contact dermatitis, PMLE and many more. kindly reply to my questions and send a pic of the lesion so that i can help you further. Based on the available details, this is my best advice for you. Good Luck.