Join Date: Jan 2002
Location: Vinson Massif, Antarctica
Lack of humidity/dehydration would be my first thought, but malnutrition, cage rubbing, and mites can also be causes.
Cage rubbing is a pretty common affliction with iguanas, even if they have lots of space, but it usually ends up with their nose rubbed raw or toenails ripped out before damage to any other part of their bodies.
Mites are usually pretty easy to find on any reptile by just moistening a white paper towel and wipe it all over your iguana, especially around areas that can have little wrinkles, like the eye or ear area. If the paper towel comes away with little red or black specks that may or may not be moving, he could have mites. If you have a hand magnifying glass, you'd be even better off at telling, but some mites are pretty dang small.
Dehydration could be caused by a number of things, even if he's getting baths and is drinking water regularly, like mites - but certain internal parasites, like giardia, can contribute to it as well.
I think it's probably worth a vet visit, of course with a vet who is knowledgeable about iguanas, just to cover your bases by going over diet, enclosure, and possibly a fecal exam. Not to sound too rude, but parts are falling off your pet, something is probably wrong - best to get it sorted out so it doesn't have a chance to progress into something worse, but not that it will. Sometimes it just happens. I've seen perfectly healthy iguanas with a missing spike or two.
She sits in her corner, singing herself to sleep.
Wrapped in all of the promises, that no one seems to keep.