Swollen Foot

[herp_collector]

Hi, my male adult Mali Uromastyx has a swollen hind right foot/ankle(mostly ankle) and I was wondering what it might be other than the obvious choice of a broken or twisted ankle/foot. He appears to favour the other leg but when I held him loosely in my hand and felt the swollen foot he didn't wiggle or move around like it hurt him. His tail is thin which is odd because my other two Malis are chubby. He also is quite lethargic. I am almost sure he has not been in any fights or been bitten. The other two Malis are female. Any treatment options or suggestions would be greatly appreciated. My mom is taking her Veiled to the vet soon(within the week) and I will bring him. Thanks, Morgan.