I am 43 years old F, and having diabetes for past 25 years old, my sugar levels are under control, and I take re-nerve plus injection twice in a month, last 15 days due to some unavoidable circumstance, I had been in sun, got sun-burn, over my legs and face and arms, but in my arm I developed a white patch, which was itchy, now that it is almost 3 weeks, the itching is gone, but the white patch is still there, may be the size is also increasing (not sure) please suggest me a medicine, to get rid of the same? Please help.