If I get Botox once, do I have to keep getting it for the rest of my life?

Lately, I've been worried about my forehead and frown lines, so I'm looking into Botox. However, I've been hearing a lot of people around me say, "Once you start getting it, you have to get it for the rest of your life."

So, I have a question. Once I get Botox, do I really have to keep getting it regularly? Or is it okay to stop after just a few sessions?

I am also curious whether wrinkles will return to their original state if I stop getting Botox after the effects wear off, or if they might actually look worse or cause the skin to feel saggy.

On the internet, there are conflicting claims: some say that stopping after being hit makes you look older, while others say it just returns you to your original state, so I'm confused about what's true.

If there are any of you who have actually used it for several years or stopped midway, please share your experiences. I would also appreciate it if you could let me know about the duration of the effects and your satisfaction level.