Hi Bombina Bob,

The photo is hard to see, but I'll give it a whirl. Is there any red or pink on the area? I cannot tell if it's an old injury, an infection, or an enclosed cyst. If you can get a clearer photo it may help. Do you see any other skin alterations?

Try and keep his tank in the 70's. give him a nice water bowl with dechlorinated water. It can be deep so long as he has a way out. They swim and hold their breath very well. Change the water and the paper towel daily. Mist twice a day. Feed as you would any frog...ca/D3 dusted every other day and multivitamin once a week. He's beautiful, btw! I would recommend metronidazole if you can get it. It is prescribed by a vet. Watch his feces to see if its runny or has a foul odor. I would recommend panacur if it is...it's for parasites.

Dr. Frye is not very expensive and is very helpful. If you'd like, you can send him a call or email. He does not charge am assessment fee.

This is an email to/from Donlisk with Dr. Frye that he has shred for us here.
http://www.frogforum.net/tree-frogs/...-prepared.html

If you keep him he'll need a large tank as he grows, at least 100 gallons as an adult.

If you can shoot me a side photo I'll tell you if he's male or female.

Be sure to wash your hands very well between frogs and tanks just in case the area is an infection. You don't want to get your others sick.

If there is an open would you can apply ORIGINAL neosporin with a qtip, daily. Do not use the type with pain reliever -it is toxic to frogs/toads. It is not a systemic treatment, so if he is carrying the infection inside the neosporin will not be enough to fight the infection. If you do plan to help him, he may need the systemic antibiotic as listed above. A vet may also recommend Baytril or another treatment.

Please keep us posted. Good luck!