How to heal and recover outer layer of skin if it has been melted or removed by steriod cream?

Question

Update:

They are everywhere on my fingers because of my psoriasis. 

I also had one on my groin but it's no longer there. I have a large stretch mark in there because when I was a child, my doctor did not advise me when to stop applying it and I kept on applying that cream until I no longer see the psoriasis there.