[Grebit]

One of my terribilis has a grey and blue spot that I have never noticed before. Should I be worry?

 

[Gastrotheca]

That does not look like a "spot" to me. That appears to be more like a bacterial infection that hasn't gone away. How long has it been there? How old is this frog?

It would be very helpful if you could share a picture of your vivarium because then we could see what the conditions are like.

Thanks for your time! Good luck!

Gastrotheca
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Crested Gecko 0.2.0

 

[Brick_frog]

If you haven't already, I would consider quarantining it from your tank until you figure this out.
Are you able to provide any other views of the lesion?

 

[Kmc]

It looks like he got a scrape. But some more views would he helpful. Not all scrapes are infected.

 

[Encyclia]

And Terribs, out of all dart frogs I have ever kept, are most prone to giving themselves scrapes.

Mark