PURPOSE OF REVIEW: Allodynia is characterized by a painful response to a non-noxious stimulus. This article reviews the pathophysiology, clinical presentation, differential diagnosis, diagnostic testing, and management approaches for the causes of allodynia. RECENT FINDINGS: Allodynia remains difficult to evaluate and manage. Despite ongoing research, significant progress is still needed to optimize the management of allodynia. Allodynia is a debilitating condition that can be difficult to treat. Diagnostic modalities and treatment options are limited. Advancements in diagnostic and treatment options are necessary to improve patient care.