Welcome to the site charlie boy. I'm sorry you have problems with your fistula. Are the nurses using short needles? I also used steroids for 26 years and for some reason skin and tissue are even weaker than I thought. I must be honest and say that I only found that out after starting needling myself. But since than I've never infiltrated myself, yet
. After some time the fistula will get stronger, and easier to needle though.
Good luck, and take care, Cas