I want to get Botox for my square jaw. Are there any precautions?

The area under my ears and jaw is always so tight that I can feel something like muscle.

I tend to look better in photos because of the angle, so that's a complex for me.

So I've wanted to get Botox since I was in college, but when I actually went to get it...

I hear the negative things about Botox particularly clearly.

Talk about developing resistance, sagging cheeks, and stuff like that... I'm also noticing some celebrity cases where it failed haha.

But now I've made up my mind.

If the side effects were severe, there's no way so many people would get Botox!

Still, are there any precautions I should know before getting square jaw Botox?

There isn't anyone who is constitutionally resistant to Botox, right?

What should I do to avoid developing resistance?

I need your help.