What is the best procedure for a double chin? Is the procedure really effective?

I'm stressed out because of my double chin, so I'm looking into various things.

My concern has grown even more, especially because my double chin stands out whenever I take photos.

Even when I diet, my double chin doesn't go away as easily as I thought. The double chin is so annoying.

So these days, I'm really interested in double chin improvement procedures.

I looked up reviews and heard that double chin treatments help refine the facial lines and make the jawline more defined. I'm especially looking forward to it because I heard that getting rid of the double chin makes the face look smaller overall.

However, since there are individual differences, I am curious about the actual extent of the double chin effect.

If anyone has had a double chin treatment, please let me know when you started noticing the effects and how long the results last.