Dermal Filler Induced Alopecia: An Update and Literature Review

Background: Dermal fillers have become one of the most widely performed minimally invasive aesthetic procedures globally. While generally considered safe, an emerging and underrecognized complication is filler-induced alopecia, which can manifest as either nonscarring or scarring hair loss. This complication has been increasingly reported with various filler types including hyaluronic acid, poly-L-lactic acid, calcium hydroxylapatite, and autologous fat. This review provides a comprehensive analysis of literature on dermal filler-induced alopecia published from 2019 to 2025. Methods: A systematic literature search was conducted using MEDLINE, PubMed, and Ovid databases for articles published between January 2019 and early 2025. Keywords included “dermal filler,” “alopecia,” “hair loss,” “hyaluronic acid,” and “filler complications.” Thirty studies were identified and analyzed. All studies were classified according to the Oxford Centre for Evidence-Based Medicine (CEBM) Levels of Evidence (March 2009). Results: The literature revealed multiple mechanisms of filler-induced alopecia including vascular compromise leading to ischemic necrosis, mechanical pressure causing pressure-induced alopecia, inflammatory reactions, and direct follicular damage. Hyaluronic acid was the most commonly implicated filler agent, followed by autologous fat, poly-L-lactic acid, and calcium hydroxylapatite. Temporal and frontal regions were the most commonly affected anatomical sites. Treatment approaches included hyaluronidase for hyaluronic acid-related cases, hyperbaric oxygen therapy, intraarterial hyaluronidase injection, platelet-rich plasma, and autologous fat grafting with concentrated growth factors. Prevention strategies emphasized understanding vascular anatomy, appropriate injection techniques, and recognizing early warning signs. Conclusions: Dermal filler-induced alopecia represents a significant and potentially devastating complication that requires increased awareness among practitioners performing aesthetic procedures. Understanding the mechanisms, risk factors, early recognition, and management strategies are essential for minimizing this complication and optimizing patient outcomes.