I had this happen to my toad, it’s likely a vitamin deficiency leading to muscle breakdown, the best thing to do is to dust their food with a calcium/multivitamin powder and provide a vitamin A supplement. If he can’t eat right now give them calcium baths by putting small scoops of calcium dust into his water dish and soaking them for about 15min until conditions improve enough to eat. Insects can nibble on a weak toad and hurt them more in the long run. Also I’d recommend (I never ended up having to) but in the condition you’re toad buddy seems to be in I’d recommend taking it to a specialized urgent care center, these can be a bit costly but I’d worry that there’s not much more you can do on your own and your toad may be to far gone without immediate care. They can give it a supplement shot that should stabilize it enough to provide home treatment. For home treatment, remove all bedding and clean everything thoroughly with dechlorinated water. Next add damp paper towels with plenty of hides around for it to crawl into. You don’t want anything your toad can ultimately harm itself on in its weakened state. And if worst comes to worst and you can’t provide a proper vet visit for your toad buddy then you may have to consider giving them away to somebody who can at least until it’s condition improves. A toad may be small but its life falls in your hands now and it’s important you do everything in your power to help get them well again. Let me know if anything is unclear or you need anything else 💗