I'm really worried about my double chin.

My biggest concern these days is my double chin.

I am concerned that my jawline looks dull when taking photos or looking down, so I am trying to consistently do stretching and massage.

I feel that it stands out more if my posture is poor, so I am paying attention to posture correction as well. I also plan to consistently manage swelling and work on firming my jawline.

How does everyone manage this?