Innovations in Refractory Melasma: Mechanism-Based Management and Emerging Therapeutic Strategies

Melasma is a common, chronic, acquired disorder characterized by hyperpigmentation, predominantly affecting women. Although its exact pathophysiology is unknown, multiple factors affect its pathogenic process since it’s considered a multifactorial disease. This review provides an updated narrative synthesis of the epidemiology, pathophysiology, diagnostic approaches, and current management strategies for melasma, with emphasis on emerging therapeutic modalities, including approaches for refractory disease, and clinically relevant insights. This narrative review was conducted following the Scale for the Assessment of Narrative Review Articles (SANRA) to ensure methodological rigor. A comprehensive literature search was performed across multiple databases, focusing on peer-reviewed studies addressing melasma pathogenesis, diagnosis, and treatment. The findings were synthesized qualitatively. The pathogenesis of melasma involves complex interactions between ultraviolet radiation, hormonal modulation, dermal remodeling, inflammation, mast-cell activity, and stem cell signaling. Its diagnosis is primarily clinical and may be supported by Wood’s lamp examination or dermoscopy. Management of melasma requires a multimodal approach, with strict photoprotection as the foundation. Therapeutic options include topical depigmenting agents, systemic therapies, chemical peels, microneedling, laser and light-based treatments, and platelet-rich plasma, and emerging combination and drug delivery strategies for refractory melasma, selected based on disease severity, skin type, and risk of recurrence. Melasma remains a challenging and recurrent pigmentary disorder. Individualized, combination-based treatment strategies grounded in photoprotection and informed by evolving pathogenic insights offer the best potential for sustained clinical improvement, particularly in patients with refractory disease. Continued research is essential to optimize long-term outcomes and quality of life.