Why does my leopard gecko have a blue spot on its stomache?

Question

i just noticed it yesterday its tail is good and it eats so i dont really know

Answer 1

as long as he is still eating and going to the loo regularly there should be nothing to worry about. its probably just organs. if its quite low down take him to the vet, the organs are quite high up in the body... if the blue bits are high to midway on his stomach it is probably just his organs.  

Answer 2

This might sound gross but your probably seeing some of his organs. The skin on their stomach is very thin and the bright red organs through the skin can look blue.... Kind of like your veins in your wrist.