What's up with this extra hole

[formica]

hmm exposed bone isnt good, even if it seems to have healed, bone just isnt ment to be exposed to the elements, a hole like that could easily get sumthing stuck inside which could lead to infections - i'd get him checked by vet - can reptiles heal up wounds like that? seems strange that no scar tissue of some kind has started to form, but i dont know anything about reptile wound healing so maybe they just cant do it...