HELP! Goldfish jumped from tank.

[FishSupreme]

I have 2 of my goldfish in a 45-gallon aquarium. Today, I had been coming back from vacation and fed them after 4 days. Afterwards, I realized that one had jumped. On Tuesday, I did a 10-gallon water change. I don't think that the water quality would've deteriorated this much. Also, now the bump on his head seems damaged. A chunk of it is missing. I don't think it was damaged when I arrived. So far, I've dosed the tank with Melafix. I'm worried about a bacterial infection, so I may add Mardel maracyn. Finally, for a while his poop has been long and stringy. Not white, so I don't think it's parasites. His behavior seem normal. A little more active then usual.
PS. he was out of the tank for less then a minute, though it was a long fall from the top.
Update: I've now seen him swimming/ floating sideways. If he has swim bladder disorder, I'll feed him peas. When I get near him, he swims to his normal spot. I'm really considering the maracyn since the wound in his bump is very bad.
Final Update: seems normal again. No weird swimming. Will feed peas just in case. I'll post a picture of his bump wound tomorrow.

 

[Forgetfullfishy]

Lots of water changes will help it heal more quickly!

 

[FishSupreme]

Okay, I can do more water changes.

 

[Forgetfullfishy]

That’s great! Can we get a photo of the injury too?

I can’t really help much but hopefully someone more experienced can help you.

 

[FishSupreme]

I'll get a photo when the lights are on

 

[FishSupreme]

Don't know if anyone is still here, but I have an update. Sorry I didn't get a picture, but the fish is eating normally and acting fine. Perhaps, the water quality had degraded. I did a five gallon water change the day after he jumped. If so, I'd think that was strange, but nvm. I'm just glad he's back to nomral. Forgetfullfishy thanks for helping me and replying.