HELP please!

[John]

Looks like a wound. Keep the frog clean and safe from jagged objects (in case it damages the wound further). I would keep it on moist paper towel that is changed every few days until the wound starts to close over. It will scar. Worst case scenario you could wipe the wound with some topical antibiotics (neosporin will work but make sure you don't leave much on the frog). However I would leave it be unless you see it start to get infected.