I have a rash on my left hand , started about 6 weeks ago. It is small blisters under the skin, started with one blister on wrist and spread to hand. No one in my family had gotten this. I was put on steriods 40mg day x 7 days, 20mg day x 7 days then 10 mg day x 7 days, the hand has still not completely cleared up. I now have a rash all over my body, small red bumps, very itchy. Could the new rash be from coming off the steriods? If so how long does a rebound rash usually last.