What Can I Do to Fix my Neck, is It Simply a Matter of Losing Weight? (photo)

It appears that you have some excess fatty tissue in the neck area.  In my experience with patients with your type of anatomy, loosing 10 lb probably will not improve the appearance of your neck.  You could benefit from an expertly performed liposuction in the neck area.  Your skin should retraction  quite nicely.  Make sure that the surgeon is experienced with this type of a procedure.  In your particular case, the actual instrumentation is less important (laser, vaser, etc.) than the technique.

The elasticity of your skin should be quite good at your age, and weight loss will definitely improve your neckline and the neck "sag" that you notice.  If the appearance of your neck still concerns you after weight loss, conservative liposuction in that area can help to improve the contour.