Introduction: Huntington’s disease is a genetic disorder, also known as an autosomal dominant neurodegenerative disease, that has typical manifestations such as motor disturbances, cognitive decline, and psychiatric symptoms. Neurologists initially classified it as a movement disorder because the diagnosis is primarily based on the presence of extrapyramidal motor symptoms. However, after careful examination of several cases, it was revealed that chorea was only one type of motor dysfunction and that tics and myoclonus were also present. Regarding psychiatric symptoms, studies have shown that patients presenting psychosis-related symptoms have a worse evolution with poor prognosis, and it was concluded that they present distinct clinical, imaging, and biological characteristics. Case presentation: The present case report aims to describe the onset of a particular case of Huntington’s disease, taking into consideration the fact that early psychotic symptoms, very similar to those identified in schizophrenia, could represent indicators of Huntington’s disease onset. An interesting aspect of this case was that our patient had no family history of neurological conditions but had a clinical picture characterized by delusions and hallucinations. These symptoms were considered criteria for schizophrenia. Moreover, chorea motor movements appeared several years after the onset of psychosis, determining the need for the diagnosis to be changed from schizophrenia to Huntington’s disease. Conclusion: We need to point out that psychiatric symptoms could represent the only initial visible change in the clinical picture, being also considered as indicators of Huntington’s disease onset. These features could help patients be easily and faster identified, allowing for proper medical interventions to be provided.