Thanks for the rating; it's greatly appreciated.
No worries about any additional questions:)
It's always amazing to me how much damage can be done in such a short period of time even though I've seen a large number of dogs with these issues over the years.
Yes, over the counter, human cortisone is fine and what I would suggest.
If you can find Vetericyn (LINK)
in local pet or grain stores, this product can be quite helpful for skin lesions of this sort. Clean first with Betadine, let it dry, spray with Vetericyn and after it's dried, apply the cortisone. It's not critical that you purchase this product but I've been impressed with how quickly skin lesions heal when it is used.
I'll look forward to chatting with you tomorrow about Toby but if you have additional questions about thistoday, let me know. For now, unfortunately, I have to step away to help a neighbor with health issues so will have to log off, but I'll check back in later and respond as soon as I can.