Hi, Chuck,
I live in Tempe, I was bit about 3 years ago, by a small bright yellow spider, the size of a pinhead. It came off of an Acasia Tree flower. Bit my back and I had a skin eating disease. Doctor covered it with a zinc paste. It finally filled in, and now I have a patch of skin that is like plastic, but it stopped the spreading and filled in the hole.
Hope he gets better, it was not fun.
Virgil