HELP please!

[daybr4ke]

It's really nice what you're doing for this frog, first of all.
I can't quite tell if the wound is simply a cut or something stabbing into the injury. Treating amphibians can be hard, and keeping the frog moist, safe and fed may be all you can do, apart from contacting a vet with exotic animal experience, which can be expensive. For now, just switch the towels out regularly, once a day or so, and maybe pick up a water dish. In addition, frogs eat pretty much only insects, so picking up some crickets at a pet store for him/her would be good, but it might be a slightly premature step, due to the location and severity of the wound. Generally, if the frog is still moving, it's a good sign. Moving, eating, and/or hunting down prey are very good signs. Hopefully someone else comes along who knows more about injuries like these. I really hope your new friend pulls through. Good luck!