Iron infusions

I am getting iron infusions as a result of weight management surgery in 2012. However since then I have been severely anemic after the first treatment it was OK. The second treatment however was not great the nurse “blew up” one of the best veins that I had in the vein that she did find she caused a hematoma . The third treatment was the latest one and I’m still severely bruised from the second treatment which was a week apart and I still more than half of treatments to go.