Facial vascular danger zones for filler injections.

Filler injections are widely used for facial rejuvenation. The technique is safe as long as some precautions are respected. In this review we will focus on vascular anatomy in the upper, middle and lower face. We performed a PUBMED research on "facial danger zones" and "filler injections" and "hyaluronic acid" and "vascular compromise" with a focus on the last decade. This is of particular importance since vascular compromise is one of the most severe adverse events possibly leading to tissue necrosis and in rare cases to loss of vision. We describe the danger zones in these esthetic units and provide recommendations how to avoid severe adverse events. We report on temporal region, glabella and nose, infraorbital region, nasolabial folds and nasal triangle, lips, and chin. Although we focus on hyaluronic acid fillers, our recommendations will also scope other filler types and autologous adipose tissue transfer. We also take a closer look on innovations to improve the safety of facial filler injections. Facial rejuvenation with hyaluronic acid fillers is a popular method. It is safe if the facial danger zones are recognized and proper injection techniques and fillers are used.