Some of these iguanas will be unable to walk properly due to spinal cord damage, and many of them will be more susceptible to common infections because they are too weak to develop a proper immune response. As the bones of the jaw become weaker it becomes impossible to eat, further exacerbating the problem. They may have distended abdomens and bones leading their owners to the erroneous conclusion that their pet is fat and sassy, and receiving an adequate diet. Growing iguanas and females laying eggs have a greater need for calcium and might me more prone to this problem. Females with eggs might not have the strength to lay them, and sometimes even require surgery if they become egg bound.
Lumpy jaw occurs when the body brings fibrous tissue to the area to stabilize the weak bones.
A lump at the jaw can also be caused by an abscess . The fold of skin on the side of this iguana is evidence of dehydration. Diagnosis A diagnosis of NSHP is made based on history, physical exam findings , and radiography. The history might indicate a diet of iceberg lettuce, dog or cat food, or packaged iguana meal. Swelling of the jaw and legs, low body weight, weakness, dehydration, poor appetite, and lethargy all might be noted on physical exam.