Hello and thank you for your question! Yes, lipolysis for the double chin—whether via injectable deoxycholic acid (like Kybella or Belkyra) or devices like CoolSculpting or radiofrequency—is generally considered safe when performed by an experienced provider. It works by breaking down fat cells, which your body then clears naturally over a few weeks. Common side effects include swelling, bruising, numbness, and temporary firmness in the treated area. It does not interfere with chin or jawline filler, but timing is important. Ideally, complete your fat reduction treatments first, as swelling and tissue changes from lipolysis can affect how filler settles. Most practitioners recommend waiting at least 4 to 6 weeks after your last lipolysis session before getting filler to allow inflammation to resolve and see your final contour. Done in the right sequence, both treatments can complement each other well for a more defined jawline. Best of luck! Genie Alexander, RN BSN for Anna Petropoulos, MD FRCS Center for Classic Beauty Boston & Danvers, MA