Hi, thank you for your question regarding what could be causing neck laxity 18 months post-SMAS facelift and neck lift. Thank you for sharing your history and your pictures. Upon analyzing your pictures, it is evident that you have hanging neck skin. It is difficult to pinpoint exactly what was or was not performed during your initial surgery. However, the presence of residual neck skin and fat suggests that a corrective procedure, specifically a neck lift involving the removal of excess neck skin, may be necessary. This procedure may also include a platysmaplasty or plication of your platysma, the neck muscle, depending on the specific needs of your case. The neck lift is typically achieved by making an incision in front of and behind the ear, with dissection extending to the neck, allowing for the resuspension of the neck skin. This procedure can often be performed through your existing SMAS facelift incisions. The revision surgery should take approximately two to three hours. I hope this response has helped to clarify your options for addressing neck laxity 18 months after an SMAS facelift. Good luck. Sincerely, J. Timothy Katzen, MD, FASMBS, FICS Plastic and Aesthetic Surgeon