If you have coolsculpting on neck will it leave the skin to sag with an older person?

It would be helpful to see photos.  However, if you have loose skin already, CS may not be the best option.  I'd advise you seek consultation with an experienced board certified plastic surgeon. 

Thank you for your question. If your skin is already sagging then you may be left with some more sagging skin. I would recommend speaking with a board certified plastic surgeon for a consultation. This way, you can explain your concerns, learn more about the procedure, and determine if you are a good candidate. Regards, 

Coolsculpting under the chin will get rid of a lot of the excess fat in that area. If you have a lot of fat in the area or if you already have some sagging and your skin is not elastic or stretchy, then you could end up with some sagging skin. See someone with extensive experience with the face. I wouldn't just trust a coolsculpting spa to give you the correct recommendation.Andrew Campbell, M.D.Quintessa Aesthetic Centers