Which one is good for reducing double chin? Mesolipo or CoolSculpting?

"For a double chin, InMode FaceTite with VASERlipo would give you the best result.

With significant neck sagging you would need a facelift / neck lift with muscle tightening (platysmaplasty). At the same time, I would recommend lasers (Fraxel, CO2, Halo, or Erbium) and microneedling RF (Fractora, Morpheus8, PiXel8, Intensif) to improve the crepey skin and wrinkles. Overall, the neck can be treated with a combination approach:

1. Microneedling and laser treatments for texture
2. Botox, Dysport, Xeomin or Jeuveau to help platysmal bands
3. Intensif, Fractora, PiXel8, or Morpheus8 microneedling RF for crepey skin and lifting
4. Injectable fillers like Belotero, Restylane Silk, Versa, and Juvederm Volbella to improve lines and folds
5. Face/neck lifting if sagging is prominent or premature, with or without platysmaplasty (muscle tightening)
6. Renuvion (J-Plasma), ThermiRF, and InMode FaceTite/AccuTite for internal tightening
7. Ultherapy and Thermage for external tightening
8. Regular Venus Legacy, Exilis Ultra, or InMode Forma treatments with facials to maintain tightness
9. PDO NovaThreads or Silhouette InstaLift cone threads for lifting and long-term collagen production

See an expert for a formal evaluation and to develop a personalized treatment plan based on your individual situation and goals. Best, Dr. Emer"

Thank you for your question. All referenced procedures are effective and may take 2 - 3 treatments, with the exception of Liposuction.   The advantage of Liposuction is that it may be a one time procedure; however there will be more down time.  The Meso along with Titan/RF  Infrared will give you a nice tight result with minimal swelling.
Best

Mesotherapy is an umbrella term for a wide variety of treatments. CoolSculpting is a non-invasive procedure that uses a vacuum applicator to draw in skin and underlying subcutaneous fat to deliver controlled cooling. This penetrates below the skin causing permanent elimination of fat. It can be administered in a variety of areas on the body, including the jaw and chin area, lower and upper abdomen, back, arms, and thighs. Please consult your doctor to tailor an appropriate treatment plan for you.