Sudden aging of neck, can anyone please comment on this? (Photo)

Thank you for your question. I suggest that you move forward and consult with a board certified facial plastic surgeon.
Best wishes,

Hello and thank you for your question. Based on your photograph, you may
benefit from a neck lift.  If good technique is used,
this can be done with minimal scarring and can result in a natural look, not
over-done look, with rejuvenation of your neck.  Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results. The most important aspect
is to find a surgeon you are comfortable with. I recommend that you seek
consultation with a qualified board-certified plastic surgeon who can evaluate
you in person.
Best wishes and good luck.
Richard G. Reish, M.D.  FACS
Harvard-trained plastic surgeon

Some people require surgery to get the best improvement.  Non invasive options for improvement include:
botox, dysport or xeomin and/or fillers to help platysmal bandsthermage radiofrequencyultherapy high intensity ultrasoundPDO nova threads or instalift for liftingsculptra injections for collagen productionbtl exilis ultra, venus legacy, and thermi250 for constant collagen stimulationJ plasma or thermiRF internal tighteningI recommend getting a formal evaluation with an expert. Best, Dr. Emer

An in-person examinations going to be required to make a determination about how to proceed. When patients have inelastic skin the neck, a lower face and neck lift is usually  going to be required. This can accomplish tightening loose facial and neck skin, and tightening the  platysma muscle cords. The  significant wrinkles in the skin and the lower part of the neck can be treated with Botox on a temporary basis.

Sorry for your problem and I would go on some complimentary consultations with experts and be evaluated in person and become informed what the problem is and how it might be corrected Dr Corbin 

 Hi, I have performed many facial shaping procedures using dermal fillers, silastic facial implants (cheek, chin), liposuction and/or facelifts for over 30 years.  From the photos, the neck has anterior platysmal bands with excess skin in the neck.  There are two options, one is the reduction of some excess skin under the chin and the other is a "formal" neck lift with lower SMAS facelift as described below.  Any significant, sudden weight loss could explain sudden skin sagging.
  Along with the minimally, invasive SMAS facelift described below, some of the excess skin below the chin can be removed using a small, curved incision under the chin.  This along with skin removed in front and behind the ear will tend to reduce the skin excess by around 70% or more.
 If anterior platysmal bands are present or the maximal amount of neck skin is to be removed, a "formal" neck lift can be done.  In this procedure, the face and neck tissues are elevated using a curved incision around the front (explained later) of the ear that continues in the crease behind the ear and then 3 inches into the posterior hairline.  The tissue is dissected from that point all the way across the entire neck to the same position on the other side of the head in a dissection that is as long vertically as the entire neck.  The Platysma muscles are tightened using a curved incision under the chin and each side is pulled upward and back again being tightened at a line behind each ear (under the tissues).  Since the skin flap pull is up and back, this will pick up any tissue laxity along the jaw line or "jowls" which must be dissected and flattened out using a lower facelift (incision around the front of the ears).  If this isn't done, pleats of excess skin will appear below each ear.
This is an extensive surgery taking 4 1/2 to 5 hours with large incisions, requires placement of drains, possible hair loss and months of recovery.
 I have performed many facelifts and neck lifts for over 30 years and have performed many minimally, invasive SMAS facelifts.  If you have "jowls” these are sagging facial tissues and the main 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 SMAS facelift is the minimally invasive, short incision SMAS 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 anesthesiano incisions within the hair = no hair lossexcess fat can be removed from the face and neckexcess skin removed from the face and neckcheeks, chin and jaw line can be augmented with dermal fillers (I prefer Restylane Lyft) or facial implantsmost 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.
 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.  When the cheeks are flat or concave 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.
 If the chin is weak, this creates an imbalance making the nose appear larger, the mid face top heavy and the lower face look short that de-emphasizes the lips and allows early formation of a double chin.  Chin augmentation using a chin implant will add projection to the chin creating harmony and balance to the lower face. 
 I have found that placement of a silastic chin implant, through a small curved incision under the chin (also allows excess skin removal) to be very safe, quick, highly effective and far less invasive than a sliding genioplasty.  I perform chin implant surgery in 30 minutes or less, often using a local anesthetic alone.  In my opinion, you are a good candidate for chin implant surgery.
 The back portion of your jaw line is a bit weak and can be augmented, without making your face appear masculine, using precise placement of a dermal filler (I prefer using Restylane Lyft).  
Hope this helps.

The great majority of patients that come to the office seeking facial rejuvenation all say the same thing - "it happened overnight!"  These things don't really happen overnight, but they get to the point the patients start to notice and one they see it, they cannot unnotice it. The changes are a loss of skin elasticity and a change in the superficial layers of skin and can be due to sun exposure, age and genetics. But if you moved from a more humid area to a more dry area skin changes of dryness can happen very quickly. The photo is so limited and from only one angle it is not possible to help you by suggesting a specific surgical plan, but by consulting with an experience plastic surgeon you should be able to get the answers you seek. 

Changes in the neck usually relate to loss of elasticity often due to sun exposure, aging and dehydration. There are few topicals that have been shown to improve both skin elasticity and collagen but one that I recommend is called Alastin Restorative Neck Complex. Unlike moisturizing creams the result is not apparent immediately but requires several months of use for  elastin and collagen buildup. At this stage I would think good hydration, sun protection and a similar product would be of benefit to you and should be considered.For patients who have prominent platysmal bands and horizontal neck wrinkles I often combined the use of Xeomin and filler injections.Best wishes,Jon A Perlman M.D., FACSDiplomate, American Board of Plastic SurgeryMember, American Society for Aesthetic Plastic Surgery (ASAPS)ABC-TV Extreme Makeover SurgeonBeverly Hills, CaliforniaIG: jonperlmanmd