How can i get rid of this scratch?

I scraped my ankle about a week and a half ago and got a scratch. it wasnt that bad, so i didnt really do anything about it. i have type one diabetes so i know it takes longer to heal, but not too long ago it started to get very itchy and it looks bigger and worse. i am putting antibacterial ointment on it and then a bandage but it is not doing any better. someone help….. it really itches. P.S. yes i have tried anti-itch cream but it doesnt help much.