Illness/Sickness: Please please help, what are these?

Hi, I have already explained my situation in the post "my little one won't eat, but will poop". Anyway, things have got better on one side (Ha Ha is more active, his skin looks good, today he ate ONE blood worm - the first one in two weeks, and he pooped),but on the other, he has these two things, I don't even know how to describe them, at the corners of his mouth, see pictures attached. What are they? They look like deep wounds and you can see what I think are his jaw bones. We are terrified!
We clean his water constantly, change it completely every day, keep him in the dark and the water is cold.
What can we do? Has anyone ever seen something like this before?
When he ate the bloodworm today it was so painful to see him struggle to swallow it, but in the end he made it, although you could tell he was in so much pain. But he must eat, he's so weak!
Please help us, we're clueless as to what to do now, we're afraid everything we do might hurt him.
Thank you!

looks like he scraped his chin on something pretty badly. Do you have anything in your tank that has sharp edges? It's hard to tell for sure, but your axie looks big enough to eat earthworms. Those would definatly fatten him up more, and he'd probably prefer live earthworms to frozen bloodworms

no, we don't have ANYTHING in the tank except for a mug in the shape of a pirate skull he sometimes uses as his "house" and a few (like 2) fake plants, but they're soft. He has been having trouble swallowing for a long while, we took him to the vet and he prescribed him an antibiotic but Ha Ha's reaction was really bad so we stopped giving it to him. And then we noticed these two wounds. I think they came from the inside out, and not the other way around. Like it was an infection in his mouth that then spread to the skin and bone. Any clue as to what it might be?
Thank you.

Did the vet grasp his jaw to open it and look into his mouth? Even though the vet wasn't the best, you may have to take him back and ask him to prescribe something else. Like I said, most antibiotics for amphibians are injected and some are taken orally. With the open sores, I don't think anything should be put on him, especially not with his reaction to the previous type. This article specifically identifies a few antibiotics that are safe for them and how to inject them - Axolotls - Health & Diseases Poor HaHa just can't catch a break.

Do you treat your water? What size tank do you have him in?

I agree, poor HaHa really needs to see a vet again. I am sure this will not be something that you can treat your self.

The water's fine, we had moved him from his tank into a smaller container, as animalslover suggested, when he first got back from the vet and he improved a little. I agree, the wounds could be caused by the vet keeping his mouth open to inspect it.

We'll take him back to the vet, and we'll let you know. Thank you for your advice. It's so painful to see him like this!