Should I Be Worried?

I've noticed this little bump getting bigger on the bottom of my Bettas top fin kinda joining to his back and its a bit bigger on one side than on the other, just wondering if I should be worried or not? I think his got a mild case of fin rot too -_- I'm treating that with at least 25% water changes every day, his been on and off with it for over a month now though, just when i think his better he gets it again and starts getting little hols in his top fin :/
His levels seem fine, the amonia was a little high about 2 weeks ago though, I got that down with water changes and some seachem aquaguard.
Amonia now -0
Nitrite- 0
Nitrate- 5-10
Ph- 7.2--7.8

 

Unless it affects his everyday life, such as swimming, eating, or anything in general, then I wouldn’t be worried.

 

Looks like he bumped or bruised himself how old is he. I know bettas spines curve a bit when older. That looks like a broken back to me

 

There's nothing wrong with his back, it's the small bump at the start of the dorsal fin.

 

I'd be more worried about what looks like popeye in his left eye.