Neck skin is thinner and finer than facial skin and so with lasers and peels it requires a more gentle touch. Excessive skin should be removed surgically, but lasers can improve mild laxity and wrinkles.
Laser resurfacing with a fractional CO2 laser would give you the most effective tightening of the skin under your neck. An experienced physician knows how to carefully adjust the settings to treat your neck. The neck requires a longer recovery period than a face would with the same treatment. Superficial chemical peels are safe, but would not give you the results you are looking for.
Written by Dr. Halaas