How long do lip fillers last? Do I need to keep getting them once I get one?

My lips are naturally on the thinner side, so I envy those with fuller lips and am considering lip fillers. I am hesitant about surgery and just want to naturally enhance my lip line, so I am looking into it. However, I have many questions because I heard that the duration of the effects varies from person to person.

People around me say it usually lasts about 6 months to a year, but some say it fades quickly while others say it lasts longer than expected, so I am curious about the actual situation. I am concerned because I have heard that once the filler wears off, the lips look thinner than their original state, and that I need to keep getting it done periodically.

I am also curious if it hurts a lot the first time, how long the swelling lasts, and if it looks awkward when smiling or speaking. I don't want it to be too thick, but rather just naturally enhance the corners of my mouth and lip volume, so I would like to know if the shape tends to turn out well according to my preference.

Has anyone here ever gotten lip fillers? I'm curious about how long the effects lasted and how satisfied you were. I'm also wondering how often you get touch-ups, and if you've ever experienced the filler spreading or the shape changing over time. I would appreciate honest reviews and advice from both those who regretted getting lip fillers and those who were satisfied. 😊