Thank you for getting back to me. Barley is not showing symptoms of any particular illness or parasite, and that makes treatment difficult. What he is showing signs of is stress. Those white bars on his face are actually called stress bars. They can also appear on the body. Stress may be caused by illness, but also by psychological factors. Something may have frightened Barley. With general symptoms such as he is exhibiting, the bets thing to do is provide general remedies. You have already provided the best one, which is aquarium salt. His symptoms don't indicate parasites, but since you have already started the General Cure, I would continue as the directions state.
In addition, I would turn off the filter for a day and see what happens. If a betta is feeling a little under the weather or frightened for some reason, the current from a filter can be too much for them. If you don't see any change in Barley's behavior within 24 hours, go ahead and turn it back on. Also check to see if any TVs, radios, computers, etc. have been left on more than usual. Some bettas are very sensitive to electromagnetic waves - from computers, TV's, microwaves, the pump running their filter, etc. Almost anything electronic can do it. It's so irritating to them that they may either try to hide or swim rapidly about as if they are crazy.
If none of the above measures help, once the General Cure course of treatment is over, you can do a water change and try a gentle antibacterial/antifungal, such as BettaFix:http://www.petco.com/product/10673/API-Splendid-Betta-BettaFix-Remedy.aspx
At that point, you will have tried everything that you can, and I hope Barley will be well. If he isn't, there is very likely an incurable internal problem. fish, like any animal, can develop cancer, kidney failure, heart failure, etc., and there's nothing we can do about those things. If Barley was full-grown when you bought him, it's also possible he was older than what you were told. Some less than ethical breeders will place a beautiful male that has been sued for breeding in with a shipment of young fish. It's a way to make a little money on a fish that will soon be too old for their uses. I hope none of these things are true of Barley, but I just wanted you to be aware of the possibilities.
In summary, continue the General Cure, turn off the filter for 24 hours, and check for any other electronics that may be disturbing Barley. If he isn't well after the General Cure treatment, try BettaFix. If you have more questions, let me know in a REPLY. If you want to, you can give me an update on how/if he responds to turning off the filter tomorrow. I hope Barley will quickly return to normal.
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