I started receiving iron injections in my buttocks 2 months ago..1 a month..i now have 2 bruises on both sides that aren't doing away..are these perm?

No: Bruising can be from bleeding from the injections you are receiving or from a new trauma. If the bleeding was in the deep tissues like muscles, the stagnant blood can take some time to seep under the skin and thus seen as a bruise. The spreading of blood this way helps it to dissolve. It might take some time to do so. Repeated bruising would require a work up by your doctor.