Thanks for the replies
Unfortunately he died yesterday night
His swimbladder issue occured within his last few hours so I think it was a secondary effect from the main disease.
Temp was 27 degrees water changes were on a dailiy basis.
His "bruises" were much larger than Izumes ones and he was in a bare tank so couldnt rub. They seemed to occur from the inside. They started off as large colourless patches which turned red after a few hours before he died. it all happened in the space of around 24 hours...I'm pretty sure it was a bad reaction to furan which is wierd because I've used it many times on other bettas with success...I guess it could be possible for a betta to be allergic to certain things.
Do you think it could be internal bleeding or poisoning from the meds or something like that?
I've got pictures if you want to see them...however they are of a dead fish.
ps. I hope Izume gets better.