although it is good that you are feeding your axolotl worms please make sure to also feed other meat sources, annelids (worms) don't contain vitamin A (retinol), vitamin A is very important to all amphibian species, lack of vitamin can cause hypovitaminosis A.
"Hypovitaminosis A, given the plethora of organ systems that hypovitaminosis A may affect, it is reasonable to institute vitamin A supplementation of any clinically ill amphibian, particularly ones with signs similar to “short tongue syndrome,” swollen eyelids, evidence of infectious dermatitis, hydrocoelom, or simply “failing to thrive”, the use of mixed dietary carotenoids may also be effective in some species" (copied from amphibian formulary)
vitamin A is found in eyed organisms ie.. shrimp, fish, crickets, flys, mysis etc..