Dromomania
Encyclopedia
Dromomania, also travelling fugue, is an uncontrollable psychological urge to wander. People with this condition spontaneously depart from their routine, travel long distances and take up different identities and occupations. Months may pass before they return to their former identities. The term comes from the Greek: dromos (running) and mania (insanity).

The most famous case was that of Jean-Albert Dadas, a Bordeaux gas-fitter. Dadas would suddenly set out on foot and reach cities as far away as Prague, Vienna or Moscow with no memory of his travels. A medical student, Philippe Tissie, wrote about Dadas in his doctoral dissertation in 1887.

Jean-Martin Charcot
Jean-Martin Charcot
Jean-Martin Charcot was a French neurologist and professor of anatomical pathology. He is known as "the founder of modern neurology" and is "associated with at least 15 medical eponyms", including Charcot-Marie-Tooth disease and amyotrophic lateral sclerosis...

 presented a similar case he called automatisme ambulatoire - French for "ambulatory automatism" or "walking around without being in control of one's own actions."

Only a handful of cases of such behaviour have been documented, nearly all in France in the late nineteenth century. On the other hand, dromomania in wider sense (e.g. spontaneous change of location undertaken due to dysphoria
Dysphoria
Dysphoria is medically recognized as a mental and emotional condition in which a person experiences intense feelings of depression, discontent and indifference to the world around them.Mood disorders can induce dysphoria, often with a heightened risk of suicide, especially in...

) can be characteristic of other mental disorders, e.g. Borderline personality disorder
Borderline personality disorder
Borderline personality disorder is a personality disorder described as a prolonged disturbance of personality function in a person , characterized by depth and variability of moods.The disorder typically involves unusual levels of instability in mood; black and white thinking, or splitting; the...

.

More generally, the term is sometimes used to describe people who have a strong emotional or even physical need to be constantly traveling and experiencing new places, often at the expense of their normal family, work, and social lives.
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