I Am Diabetic And Have A Growth On My Ankle,

I am Diabetic and have a growth on my ankle, first doctor said it was insect bite, yes it did look like one, got about the size of grape tomato, it is changed shape a few times getting longer and then recently I bumped that ankle on the leg of a table and now growth is a few the size of large peas. There has always been pain in this ankle. R. Ungaro