Egg type growth on axolotl gill!

Recently on my golden axie I noticed what looks exactly like a transparent fish egg on the end of one of it's gills. It hasnt eaten in about a week now which i originally attributed to rapidly changing temperatures but my albino axolotl in another tank setup is now eating a healthy amount after being kept at a consistently low temperature. I only just noticed the egg thing on the end of the gill due to it being transparent but this is definitely a cause for concern! The growth itself is totally round and see through and about 5mm wide. I haven't heard of anything like this before it is really worrying me as I have had this axolotl for 7 years now, it's at least 10 years old and I haven't seen it in such a poor state before, although it did lose an arm half a year ago

Do you have a picture? It sounds like a very odd thing if it is transparent and could be some sort of swelling, but I cannot be sure. Are you sure its a growth from the gills and not something that's just stuck to the gills?

Unfortunately I don't have a camera good enough to pick up the growth on the end of the gill. It is certainly a growth on the gill and not anything else. My axolotl is eating again on a a semi regular basis but the growth won't go away. I know it's difficult to imagine but the growth is a spherical and transparent almost newt-egg like shape and size on the gill. I feed him a mix of frozen bloodworms, earthworms and meat and he has never been as thin as he is now. Due to a sudden funeral I will be leaving town shortly and he will be in the care of someone totally new to axolotls.
These are desperate times for me and the axolotl and I really would appreciate any info on what is wrong with my axolotl. The only exotic vet in my town doesn't have a clue when it comes to axolotls so that would be a waste of time too. All of axolotl's gills are still at a healthy length, his tank is clean and he doesn't share it with any axolotls or other life forms, just a few simple rocks and plants and a very effective filtration system. I've cared for this axolotl for so long now and he is over 10 years old, losing him right now would be such a loss for me, I hate to see him like this He isn't floating around the tank or anything like that, but he looks emaciated and pretty sickly, and leaving him in the hands of a kind hearted but ultimately inexperienced owner I feel that when I leave in a couple of days for a weeks time it shall be the last time i will see the axolotl

And as I write that the little fella eats a block of bloodworms the size of his head Gotta love the hardy little things

i have the same problem! do you know what it is? my axxie is only very young, hes about 22 months old