Dieting should be the priority, but... a double chin lift?

Hello. I am very concerned about the double chin that has formed recently due to sagging skin under my chin, so I am inquiring about a procedure.

I am stressed because my jawline becomes blurred and my double chin stands out, not only when I lower my head but also when I look straight ahead. I am not sure if the cause is fat or sagging due to decreased skin elasticity, so I am wondering what kind of procedure would be suitable for me.

Lifting lasers like Ulthera, Shurink, and InMode, or fat-dissolving injections like contouring injections and V-Ole, are commonly recommended for double chin improvement. I would like to inquire whether a single procedure or a combination treatment would be more effective for my condition.

I would like to know how long the downtime is after the procedure, such as pain, bruising, or swelling, and whether it interferes with returning to daily life. Please also let me know if the procedure can be performed on the same day after an in-person consultation.