Blood parrot with bacterial infection? Parasite? Fin Rot?

I have a blood parrot that has some issues. It started about 3 weeks ago where he had a white patch on his face that looks like his skin was scraped off. It slowly got bigger. We treated it with fungal medicine and it didn't improve. The area hasn't changed much in the last week or two but now it has white stringy things coming off of his top fin. Today I noticed a white thing coming out of its anus it doesn't look like poop. The fish has not been acting wierd and has been eating fine. I have noticed him fighting bit more with our other parrot and EBJD. The water parameters are ph 7.6, ammonia 0, Nitrites 0, and Nitrates 20ppm I have tried to take some pictures but havent gotten any great ones. I cant get one of whatever is coming out of it. Please advise.

Here are some more pics, maybe a little bit better. It looks almost like he has a prolapse.




It's just generally weird because it has been like this for a while like 2 weeks and there seems to be no change in eating or behavior.

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Ok I got him isolated in a hospital tank. After more research I think it's definitely a prolapsed anus. I am going to take him off food for a while and then give him some veggies. Do you think I should still use the general cure? Also, for what can cause a prolapse?

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We bought a hospital tank and put it in there with water from the main tank and one of the filters from the main tank the water parameters are the same but the nitrates are lower now. We treated with the api general cure. And we stopped feeding yesterday. It looks like the parrot is deteriorating. I cant get a good picture because it is just hiding under its cave basically on the substrate. The white on the face and fins seems to be better, but unfortunately the white coming from its anus looks like many of the pictures I have seen of fish with a prolapsed anus. The parrot seems to be getting more listless and pale. At what point do you decided if they aren't going to make it and if they aren't is there a humane way to put them to sleep? I don't want to watch it suffer.

Ok thanks were going to give it the best chance. He was swimming again earlier and looking a little better. Thanks for your advice.