Oh, God, don't try to lance it. Take her to an exotics vet.
Posted by Roger on 1/21/2016, 8:57 pm, in reply to "Abscess??"
How could you create a sterile field? She won't want you to wash and disinfect the skin on her face. I've never heard of an iguana who could cooperate during painful treatments. You would have to do it with her under anesthesia. Plus some of the abscess contents need to be sent to a lab for culture and identification, so you can select an antibiotic that best targets the infectious agent (probably bacteria). \ roger