I’m 55 is it a good idea to have neck Lipo done? (photo)

Patients of any age are generally candidates for chin lipo  alone IF and ONLY if they have minimal skin redundancy in the neck. If they do have excess of skin, chin lipo could cause worsting of the skin sagginess which translates in an cosmetic unpleasant result. 
Patients in their 50s with excess of fat in the neck but also significant excess of skin under the chin ( "turkey neck") usually require surgical neck lift to correct both the excess of double chin fat and excess of redundant skin. In my practice I routinely perform neck lift surgery wide awake under local anesthesia. 

The appearance of your neck is due to skin excess, fat and muscle laxity. Treatment of all three areas is better served by a neck lift.If liposuction alone is performed, the appearance of your neck skin will worsen with sagginess and wrinkling.Generally isolated liposuction of the neck just removes fatty tissue , not addressing loose skin and muscle.It is best to consult with a board certified plastic surgeon. 

A combination of non-surgical options like Kybella, PDO NovaThreads, Ultherapy and Thermage would do well in combination for skin tightening for the neck. VASER Liposuction (with ThermiRF, Renuvion and InMode FaceTite) is a great alternative for contouring and tightening the chin and neck and can be combined with a neck lift at the same time, if you're a candidate. I suggest getting a formal evaluation with a cosmetic dermatologist to develop a long-term treatment plan that works for you. Best, Dr. Emer.