I got him over a year and a half ago. Also, I believe Picasso was kept in a cage by himself. The breeder was very careful and particular about the health of his chameleons.
The only possibility I can think of is a lizard I watched for a friend about 4-5 months ago. They were separated and...
Yes, that was helpful.
One thing, however. None of the causes applied to Picasso. He is the only lizard in the house, and I have not been in contact with any other lizards.
What can be done to help him (if anything, or is it going to stay there/regrow if removed)? Also, how could he have gotten it?
Is there anything else it could be?