When I lower my head, the skin under my chin sags, making it look like a double chin. Is it possible to consult about lifting the boundary between the chin and the neck?

I have been doing a lot of video conferences on my laptop lately, and when I look at my face on screen, I am constantly bothered by the fact that the skin under my chin is sagging, making it look like a double chin. My weight hasn't changed much, but even when I tilt my head down slightly, the boundary between my chin and neck becomes blurry, and from the side, my jawline feels less distinct than before. As the weather has become drier, the skin on my neck seems to have thinned and lost elasticity, so I can't really tell if it's due to aging or fat. I would like to get a consultation for a lifting procedure, so I am asking these questions in advance.

- How do you distinguish during a consultation whether sagging under the chin is due to skin elasticity issues or fat?

I am wondering if the boundary area extending from below the chin to the neck is also included in the lifting consultation scope.

Would it be good to discuss lifestyle habits, such as looking down at a screen for a long time, during the consultation?

If I receive a consultation during a dry season like late autumn, are there any specific care measures I should take in advance?

To help with understanding, I have included a reference image with a similar appearance below.