(Question) How long does under-eye filler last? What are the side effects?

Has anyone tried under-eye filler?

Lately, my under-eye area looks so flat in every photo I take, so I'm seriously considering getting aegyo-sal fillers.

I was so envious of people who naturally have aegyo-sal (under-eye bags) when they smile.

But since it's around my eyes, I'm kind of scared, and I've seen a lot of stories about side effects, so I can't easily make a decision.

What I'm most curious about is the duration and pain.

It seems like how long it usually lasts varies greatly from person to person, so I'd like to hear some actual reviews.

I'm confused because some people say it dropped in a few months, while others say it lasted for nearly a year.

I'm also wondering if the pain is very severe during the procedure. Since it's under the eyes, I have a feeling it's going to hurt a lot.

If anyone has tried this, I would appreciate it if you could let me know how satisfied you were, whether it looks natural, and if it feels awkward when you smile.