Forehead filler is just an unpleasant pain.. I got it in tears because it felt like a needle was going in, but I am very satisfied. It adds volume to the forehead, making it look more three-dimensional and smaller . I had it done 8 years ago and it looked a little off, so I got it again 4 years ago. It's been a while. I don't remember ㅜ But even now, the volume on my forehead remains the same. What I need to be careful about is that I have to be careful about my forehead for a week after getting filler. I was sleeping next to my sister and got hit on my arm, and it went in slightly hahaha It wasn't even hit hard; I could have retouched it, but I didn't bother going and I lived like that for 4 years, and I am a legend.