My baby iguana has red spots on its underside. Is it serious?

Without an image or physical exam, it can be difficult to determine exactly what is going on. It could be a bacterial or fungal infection, skin from shedding or trauma (burn, abrasion, etc). Ideally, Iggy should be examined by your veterinarian or a vet experienced in treating reptiles. You can find one using the link below if necessary. http://arav.site-ym.com/search/custom.asp?id=3661 In the meantime, confirm proper environmental parameters. To much humidity can promote bacterial or fungal overgrowth, too little humidity can lead to difficult sheds. Make sure Iggy cannot come into contact with either the heat lamp or UVB light source. Minor infection can be treated with daily cleanings using diluted Betadine or Chlorhexidine. Clean and sanitize the cage and use plain paper towels as substrate to make cleaning easier until the issue is resolved.

It could be a hard shed or local infection (bacterial or fungal). Soak or mist him with warm water. Cleanse the area with diluted betadine or chlorhexidine solution daily. If the spot doesn't resolve or spreads, have him examined by your veterinarian or an experienced herp vet.

The black spots look like skin that did not shed properly. I suggest you check the cage temperature and lighting as that is the number one reason they get lethargic. Also make sure her diet is correct and you are giving her calcium supplements. ( http://www.reptilesmagazine.com/Care-Sheets/Lizards/Green-Iguana/ )

Thanks for reaching out about Guan. If he is having difficulty using his limbs, a veterinary visit is highly recommended. Metabolic bone disease can result in clinical signs from weakness to fractures. Environmental temperatures should be in the 90-100 under the basking site and at the lowest 70s at night, therefore they should never feel cold. See your local veterinarian as soon as possible. Good luck.

The dewlap should not feel hard or firm. There are variations in color, so the yellow hue may be normal or not. You need to have Edoardo examined by your veterinarian or a vet experienced in treating reptiles to diagnose illness or injury. In the meantime, confirm proper environmental parameters and diet. See your vet sooner if you notice lethargy or decreased appetite.

Thanks for reaching out about Rex and including a photo. Unfortunately you did not include a photo of the belly and black spots. But, Rex appears thin and dehydrated in the photo. A veterinary visit is recommended to assess health and to examine the black spots. Good luck.

Any small nick or scratch can become infected. He could have scratched himself in or out or the enclosure. If he is behaving normally, you can treat it topically with a diluted Betadine cleanse followed by a dab of triple antibiotic ointment daily until it resolves. See your veterinarian or an experienced herp veterinarian if he becomes lethargic, loses his appetite or if the area doesn't heal, becomes swollen or has discharge.