1. Introduction
Human skin aging results from the combination of biochemical, morphological, and physiological changes over time, genetic and epigenetic factors, and cumulative damage caused by external factors, including smoking, diet, severity, and most notably, ultraviolet radiation.The search for procedures to slow the aging process is increasing; limiting or hiding its effects on the skin and its appearance. The main surgical procedures for facial rejuvenation are facelift, rhinoplasty, otoplasty, and blepharoplasty. Facial lifting aims to improve facial and cervical aesthetics by suspending muscle compartments and skin giving the patient a more youthful appearance.In recent years, both dermatology and plastic surgery have given increasing importance to minimally invasive rejuvenation treatments capable of providing satisfactory results.On the other hand, photobiomodulation (PBM), which has also been used in facial rejuvenation, consists of the use of non-ionizing, non-thermal, and non-ablative light, without side effects and is capable of generating analgesic, anti-inflammatory and repairing results.The therapeutic effect of LEDs can be as efficient as that of LASERs as long as the same dosimetric application parameters are respected. These sources have advantages in the fact that they can be grouped for applications in larger areas and still bring security for home use.As previously mentioned, some studies have been evaluating the effects of PBM on facial rejuvenation, with the majority using red light.