I found a frog with a bone sticking out of its skin and I want to help it. I looked on the internet and it looks like it is the part where his pelvic girdle attaches to his spine. Please help
The only thing you can do is take him to a vet. Chances are you won't want to spend a ton of money on a frog you found, so see if you can find a wildlife center or something that will take him from you and get him fixed up or euthanized (depending on the severity).