visual blindness, olfactory loss, or hearing disturbance)
With mixed symptoms.Specify if:

Acute episode: symptoms present for less than six months
Persistent: symptoms present for six months or more.Specify if:

Psychological stressor (conversion disorder)
No psychological stressor (functional neurological symptom disorder)

Exclusion of neurological disease
Conversion disorder presents with symptoms that typically resemble a neurological disorder such as stroke, multiple sclerosis, epilepsy, hypokalemic periodic paralysis or narcolepsy. The neurologist must carefully exclude neurological disease, through examination and appropriate investigations. However, it is not uncommon for patients with neurological disease to also have conversion disorder.In excluding neurological disease, the neurologist has traditionally relied partly on the presence of positive signs of conversion disorder, i.e. certain aspects of the presentation that were thought to be rare in neurological disease but common in conversion. The validity of many of these signs has been questioned, however, by a study showing they also occur in neurological disease. One such symptom, for example, is la belle indifférence, described in DSM-IV as "a relative lack of concern about the nature or implications of the symptoms". In a later study, no evidence was found that patients with functional symptoms are any more likely to exhibit this than patients with a confirmed organic disease. In DSM-V, la belle indifférence was removed as a diagnostic criterion. Another feature thought to be important was that symptoms tended to be more severe on the non-dominant (usually left) side of the body.
Hippocrates argued that a lack of regular sexual intercourse led to the uterus producing toxic fumes and caused it to move in the body, and that this meant all women should be married and enjoy a satisfactory sexual life.From the 13th century, women with hysteria were exorcised, as it was believed that they were possessed by the devil. It was believed that if doctors could not find the cause of a disease or illness, it must be caused by the devil.At the beginning of the 16th century, women were sexually stimulated by midwives in order to relieve their symptoms. Gerolamo Cardano and Giambattista della Porta believed polluted water and fumes caused the symptoms of hysteria. Towards the end of the century, however, the role of the uterus was no longer thought central to the disorder, with Thomas Willis discovering that the brain and central nervous system were the cause of the symptoms. Thomas Sydenham argued that the symptoms of hysteria may have an organic cause. He also proved the uterus is not the cause of symptom.In 1692, in the US town of Salem, Massachusetts, there was an outbreak of hysteria. This led to the Salem witch trials, where the women accused of being witches had symptoms such as sudden movements, staring eyes and uncontrollable jumping.During the 18th century, there was a move from the idea of hysteria being caused by the uterus to it being caused by the brain. This led to an understanding that it could affect both sexes.