Widen mouth and tighten area under cheeks w/ a mini face lift? Possible for a 20 year old?

For unique cases where a variety of modalities could be used to treat the condition, I would suggest an in person or virtual consultation to develop a custom and effective treatment plan. It is difficult to precisely define the best option without collecting the same information. I suggest reaching out to an expert for a consultation with surgical and non-surgical methods to get a comprehensive option. Best, Dr. Emer.

CiciciR    So sorry but you are far too young to consider any type of facelift.  Without photos, it is hard to consider any other options. It is best to consult with a board certified plastic surgeon to address your concerns. Good luck!

 Hi, I have performed many SMAS facelifts for over 30 years and have performed many minimally, invasive SMAS facelifts.  Non smiling photos of your face from the front and side would help in the evaluation.  If "jowls" are present in the lower face as described below (very unlikely in a 20 years old but I have seen it in 27 year olds) a SMAS facelift would be considered.  There are no procedures that would aesthetically widen the mouth.  The lips look best when they are full and properly proportioned with the upper no more than 3/4's the size of the lower lip.  A balanced chin, on profile, will also highlight the lips.
 Following my beauty principles, women look the most feminine, youthful and attractive with heart shaped faces.  Heart shaped faces have cheeks that are full and round in the front.  Cheek augmentation with a dermal filler or using cheek implants for a permanent enhancement will create full, round cheeks that will feminize the entire face.  Conversely, men look chiseled and handsome with angularity in the cheeks, chin and mandibular angles.
  If you have "jowls” these are sagging facial tissues and an indication for some form of a SMAS facelift.  The underlying SMAS layer, of the face, must be dissected, lifted, trimmed and re-sutured (not merely folded or suspended with threads or sutures that will not last).  The excess skin is then removed and the facelift incisions closed.
 My most popular facelift is the minimally invasive, short incision facelift that has all the benefits of more invasive facelifts (traditional, mid-face, deep plane, cheek lift and subperiosteal facelifts) but with these added benefits:
very small incisions and no incisions extend or are placed within the hair.
minimal tissue dissection = less bruising and swelling = rapid recovery ( several days instead of weeks or months with the more invasive type facelifts mentioned)
can be performed in 90 minutes or less, with or without general anesthesia
no incisions within the hair = no hair loss
excess fat can be removed from the face and neck
excess skin removed from the face and neck
cheeks, chin and jaw line can be augmented with dermal fillers (I prefer Restylane Lyft) or facial implants
most patients fly back home to parts all over the world in as little as 3 days post-op
I combine facial shaping with every facelift procedure.  When jowls are present, these should be done in concert and not alone or separately in order to create a naturally, more attractive face.
Hope this helps