Will filler make fat/sagging neck look worse? (photos)

There is very little to be gained by having the fillers before the planned surgery. In my opinion, money badly spent!. You are likely to get dramatic improvement with your planned surgery for chin augmentation and liposuction as that is the right treatment for you. Rather than the implant, however, consider a genioplasty as you have significant deficiency of your chin. In my opinion that is likely to give you an edge over the implant option.

For unique cases where a variety of modalities could be used to treat the condition, I would suggest an in-person or virtual consultation to develop a custom and effective treatment plan. It is difficult to precisely define the best option without collecting the same information. I suggest reaching out to an expert for a consultation with surgical and non-surgical methods to get a comprehensive option. Best, Dr. Emer.

Hi there,Thank you for your question! Jawline
and chin filler will improve the definition of the lower face and this will no
doubt improve the appearance of the neck just by having that structure there.
You may also like to consider fat dissolving injections alongside filler as a
non-surgical alternative to address the neck. I would recommend scheduling a
consultation to discuss these procedure options with an experienced
practitioner.I hope this helps!Best Wishes,Dr. Rupert 

Your best option is to do a chin implant, neck liposuction and thermitight all at the same time. Do not waste any money on fillers as you will need a LOT of filler to mimic the effects of a chin implant. RegardsDr. J

I think adding filler to your chin would give you more chin projection, but I do not think it would have any significant impact on the neck below.  I also do not believe the filler would make your neck appear worse.  

A variety of options can be used to address the problem you are experiencing including PDO threads. CoolSculpting to reduce fat if there are. In order to tighten and firm your skin, I would suggest combining Secret RF with Fraxel. Filler is also an option when appropriate. Please contact a qualified provider or a board-certified physician with extensive experience in these procedures.