i can't blindly tell you "what it is" over the internet. i would need to examine you and perhaps send a specimen off to pathology. clearly the dermatologist is your skin specialist so if you lesion is bigger i would suggest that you go back. forego the steroid injection until you consult the dermatotogist again or see a different dermatologist for a second opinion.
i have a bump on my nose that has been there since sep. i saw the dermatologist and he scraped it. now it is bigger. the dermatologist said that it may be a vascular hemangioma but i don't think i agree. it started as a raised bump on the bridge of my nose after he scraped it it has grown from 3mm to 10mm and now has visible blood vessels. i saw a plastic surgeon and he wanted to inject it with a steroid to see if that would shrink it but he is not certain what it is either. the dr. said that it is uncommon for adults to have a hemangioma and i can't find anything online that is similar to me. what is it?