Can kybella work for a woman is 52 years old or cause saggy skin need lift?

Kybella is best in patients who have good skin elasticity. Patients with sagging skin under the chin are going to best be served with a surgical treatment such as a neck lift with liposuction. If you are completely adverse to surgery, you could try a combinations of procedures such as Kybella and an RF treatment for skin tightening but you would really need to be realistic about your expectations. 

Thank you for your question. Kybella is approved for the safe and effective treatment for the permanent reduction of submental fat. It is the only non-surgical treatment that is FDA approved for the removal of the "double chin." Keep in mind that two to four Kybella treatments may be required for optimal results. I suggest that you move forward and consult with a board certified facial plastic surgeon.
Best wishes,

A clinical examination is required to determine if you are a candidate for Kybella or liposuction or will need a neck lift. If you have excessive skin beneath your chin then usually a facelift/ neck lift is required. Removing fat and not treating excess skin may leave you with an undesirable appearance. I would recommend a consultation with a surgeon who can perform all these procedures. Good luck