Complications of hyaluronic acid fillers.

Hyaluronic acid filler use, user groups, and indications have expanded significantly in the past several years. This group of fillers is extremely safe in experienced hands. Complications are infrequent but can be devastating. There can be no substitution for recognized and specific training. Prompt recognition and proper treatment of serious complication can moderate and even prevent serious sequelae. This article describes the most frequent and serious complications, their prevention, and treatment.