I would like to inquire about lip line correction.

I am leaving a comment because I am concerned about my lip line.

My lip line is a bit blurry and asymmetrical.
In particular, the border of my upper lip is unclear, so it's really hard to get the shape I want whenever I do lip makeup, and no matter how carefully I apply it, it doesn't look neat.

People around me advise me to improve my lip line to make it more distinct and pretty with procedures like botox or filler at the corners of the mouth. I'm curious as to which procedure would be most effective in solving my problem.

Rather than simply adding volume, I would like to naturally correct my current unclear and asymmetrical lip line.
Among the various treatments available, if there is a customized solution that can be applied to a case like mine and achieve satisfactory results, please advise.