New diagnostic categories and research advances on functional neurological disorder

Functional neurological disorder (FND) is common in clinic, individual susceptibility and social environment factors play an important role in its pathogenesis, and the prognosis is poor. In recent years, there have been three new diagnostic categories of FND, long corona virus disease (COVID) syndrome, Havana syndrome and TikTok tic syndrome. This article reviews the pathogenesis, clinical manifestations, diagnostic criteria and treatment of long COVID syndrome, Havana syndrome and TikTok tic syndrome in order to assist the diagnosis and treatment of the disease.