If you get a rash after a steroid injection, it's usually due to an allergy to the carrier oil the UG lab suspended the raw hormone in. It's pretty common. A lot of UG labs use peanut oil as a carrier oil which a lot of people are allergic to.
Sadly, you won't be able to keep using the gear. You are going to keep getting the same side effect since you are allergic to the oil.
You are going to need to re-order gear from a new source that uses a different carrier oil.
If you need a new source - head on over to evolutionary.org and check the source reviews section