Ive been increasing my insulin until i come to a happy medium as suggested by my nurse. Im constantly at 12 (give or take) so leaving at that until i get to see her on 8th Feb. Yesterday i started with pain on the left hand side of my back, round my waist and going into my side. I suspect it may be a Kidney infection but i wanted to know if lnsulin can cause damage? Is it that, that is causing the pain? Im on Humulin I 18Units pre breakfast and 12units pre evening meal? Im concerned im doing myself more damage?