Hi there, sorry that Chito is not so well. You'd really need xrays to tell you what the human eye can't see. For now, keep all of his climbing areas lower to the ground and don't let him anywhere he can jump from like a table, bed or even while being carried. Only thing you can do is keep him from hurting himself, give him plenty of calcium and make sure his uvb bulb is good. BTW, what exact uvb bulbs do you have ? Take him in the sun as well, but keep a close eye on himIt may be helpful to post a few pics of him [ full body ] of his tank and his lighting . A video of him walking would also be good.
So sorry that Chito is not doing well. Can you review the type/brand of UVB you are currently
using, & more of your tank setup for us?
It sounds like he may have hurt himself, or he is having bone issues from improper calcium
intake & UVB exposure.
Has his beard been black or darker lately?