I'm 26 Years Old and the Skin on my Neck Has Started to Sag?

The first step is to develop a great skincare routine using medical grade skin care products like Transform MD. An experienced aesthetician can customize the right product combinations for your skin. You can also consider treatments such as Moprheus8 to treat premature sagging. Morpheus8 combines RF technology with microneedling to improve overall skin tone and texture. I've included a video I hope you find helpful.

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, or Erbium) and microneedling RF (Fractora, Morpheus8, 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, or Morpheus8 microneedling RF for crepey skin and lifting
4. Injectable fillers like Belotero, Restylane Silk, 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

I recommend a combination
of Pelleve and Nectifirm cream to address skin laxity in the neck region.
You will need 4-6 Pelleve treatments and you will need to use Nectifirm
twice a day for at least 2 months.