**1. Introduction**

The fat accumulation in sub-mental area is a problem at the forefront of many minds, since excess adipose tissue leads to the drooping of lower face and causes further ptosis. These changes affect a full esthetic perception of the face, since a clear oval shape of the face is associated with young age and the smoothing of lines and corners with old age [1].

Plastic surgery offers a variety of ways to solve this problem, among which are different variations of platysmaplasty, combined lifts in combination with liposuction and other. However, all of them are tempered by significant stress of an invasive procedure, a long rehabilitation period, providing anesthetic procedures and a high risk of complications [2].

The realities of modern life and modern lifestyle determine that when choosing an operative measure most patients want a light invasion, a short rehabilitation period and no general anesthesia [3].

We use laser-assisted liposuction to correct the excess fat accumulation in submental area and at the lower face as well as to correct age-related alterations [4].

Many studies conducted by various authors on the effects of laser emission in tissues have shown that lipolysis was followed by small blood vessels coagulation in adipose tissue, cell lysis (bursting), reorganization of the reticular dermis and collagen coagulation in adipose tissue. Histological tests have demonstrated some of the advantages of using the Nd: YAG laser. These include formation of new collagen, reduction of intraoperative and postoperative hemorrhage as well as a reduction of adipocyte quantity [3–6].

Furthermore, a dermal flap retracts after laser, which in turn allows for reaching the lifting effect. In 2002 Badin published an article entitled "Laser Lipolysis: skin flaccidity under control", in which he demonstrated histological changes of tissue after laser treatment. During the operation of a laser, adipocyte membranes break down, blood vessels coagulate and collagen fiber restructures [7].

The research demonstrated that laser lipolysis with selective exposure to ND: YAG laser radiation with a wavelength of 1064 nm is less traumatic and is accompanied by tissue reactions, which appear by neocallagenesis and reduction of the dermal flap. In order to maximize the impact and minimize the negative consequences of laser, Badin recommended temperature control of the skin integument in the surgical area, range of safe temperatures is between 38-41C [7]. The laser lipolysis allows performing a surgery on the so-called hazardous areas, which include lower legs, arms, face [3, 8].

Thus, the development of algorithms for using laser-assisted liposuction in hazardous areas such as the lower face and the submental area continues to hold its relevance for greater effectiveness and minimum complications from this surgery.
