I have a tokay gecko with a lump under the skin on the side of its neck...what is this and is it dangerous????

Answer 1

It may just be a calcium sac, tokays are one of several gecko species that store calcium just behind the jaw. It forms soft looking visible bulges and is usually seen on both sides of the jaw. If the lump you see is very obviously on one side only then it may be something else like an abscess.