I am 18 years old with a sagging, jowly face. What are my options?

It seems as though you may have facial nerve weakness and/or displacement of soft tissues from the trauma.  In my experience, evaluation of the deformities is extremely important, and may involve looking at the bones (i.e. CT scan) as well as the soft tissue displacement to determine the best approach, especially if there is any facial nerve weakness.  Seek consultation with a facial surgeon experience in both reconstructive and cosmetic techniques, as it is likely that the procedures recommended will require a combination of both.  The specialty is far less important than the expertise and experience of the surgeon.

Although you're very young to consider a facelift, your situation is unique in that you have had an apparent facial palsy secondary to a neurologic event.It would be very important for you to seek consultation with your primary care doctor or neurologist to refer you to a plastic surgeon for a reconstructive procedure.A unilateral or one sided facial tightening can certainly be done in patients who have weakness or paralysis on one side of the face which causes sagging around the mouth and jaw line.