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Functional dystonia is one of the most common phenotypes of functional movement disorder (FMD). Multiple clinical manifestations of functional dystonia are complex and some symptoms overlap with idiopathic dystonia. The diagnosis of functional dystonia is challenging and the overall progenosis is poor. This article reviews the clinical manifestations, auxiliary examination, diagnosis and differential diagnosis, treatment and prognosis of functional dystonia, in order to improve clinical cognition and promote the multi‑disciplinary team (MDT) of functional dystonia.