Hello, thanks for your question and pictures. The appropriate depth and energy level for Morpheus8 treatment of saggy neck skin will depend on several factors, including the severity of the sagging, skin thickness, and patient preference. Typically, Morpheus8 is used at a depth of 2mm to 4mm for treatment of the neck /Jaw line areas. The energy level will depend on the patient's skin type, skin thickness, and treatment goals. In my clinical practice, after I perform a face to face consultation where I assess the patient's skin/ fat then I recommend the appropriate depth and energy level for their specific needs. usually I advice a protocol of 3 sessions 4-6 weeks apart including local anesthesia infiltration to reduce the discomfort. My protocol of Morpheus 8 is settle with the proper level of energy ( 30-40 Joules and Depth 2-4 mm fixed and cycle mode) in order to have tissue contraction/tightening (FAT and SKIN) and collagen stimulation that help to tighten and lift the skin. However with the above parameter of depth and energy level , you would need a proper local anesthesia infiltration to reduce the discomfort. During the treatment, I use the same platform of Facetite that can used only by doctors. in some cases, where the skin is mild to moderate saggy and the patient refuses to undergo to Face/Neck surgical lift, then I offer an alternative option : Face/Necktite (one session) in combination with Morpheus 8 ( 3 sessions 4-6 weeks apart) or Renuvion/J plasma ( 1 session). It is important to note that Morpheus 8 is a safe and effective treatment when performed by a qualified doctor. The treatment is minimally invasive and has a short recovery time. Patients may experience mild redness, swelling, and tenderness immediately after the treatment, but these side effects usually resolve within a few days. In summary, the appropriate depth and energy level for Morpheus 8 treatment of saggy neck skin will vary depending on the patient's specific needs. I would suggest to seek for a qualified doctor expert aesthetic medicine/surgery and skin tightening treatment to evaluate your skin/fat during a consultation and recommend the appropriate depth and energy level for your specific goals. Hope this helps, All the best, Dr Giuseppe Fiore