Disease, parasite, or injury?

[Solstice_Lacer]

One of my white clouds has one bottom fin constantly stuck out, with some red swelling/bumps/sores at the base. I don't know exactly how to describe it. He was eating fine just prior to this video and doesn't currently seem distressed. No nitrites or ammonia, very low nitrate, 69F, close to neutral water, no recent changes in water chemistry.

Any thoughts?

 

[Colu]

It's could be a prolapse what I would do is Epsom salt baths 1 table spoon for 2 gallons for no more than 15 minutes for 5 days as Epsom salt acts as a muscle relaxant to help your fish reabsorb the prolapse @Solstice_Lacer