So, I just purchased a young iguana two days ago from a pet store along the boardwalk on a beach trip. She was kept in a tank with about a dozen other and smaller iguanas, it was very insufficient but my individual seemed alert and healthy and I kind of fell in love with her so I took her home.
She's been eating well and regularly, and has remained active and curious, however, today I noticed that what I had thought previously was an old injury was doing something weird. When I bought her, I took note of a black lump on her left kneecap, I thought maybe she had broken it when she was a baby and it had regrown that way, seemed likely given her cramped enclosure and excess tankmates. Today though, after her morning bath and feeding, the lump that I had thought was old and permanent had shifted outwards from her skin, exposing a large lump of dead skin. She didn't react or show any irritation when I touched it to inspect it, and to my surprise, the lump started peeling immediately after I prodded it. During one of her laps in the tub, it pulled off almost entirely. However, it turned out to still be connected to some living tissue at the end and I really have no clue what this is anymore. I'm hoping it's just an unusual abscess that's in the process of removing itself and I should just bathe her regularly to keep it clean and help her remove her. But I can't really find anything that looks quite like it, I will say this though, it doesn't seem to be connected to her thigh muscle, it goes directly to about 1cm beneath the primary knee joint.
Any help or diagnosis would be much appreciated, I'm a minimum wage full time dishwasher with a home and tuition fees, there's really no feasible way for me to afford the vet unless they'll take 200$ because that's my entire workweek's fruit. I'm worried about my iggie, she seems so healthy otherwise but her knee looks so brutal I can't believe she's not more reactive and defensive, and I'm really surprised she's still letting me feed her.
Google drive folder with pics linked