If you feel overly anxious and worried, that is a sign of neurosis: a mental illness with no particular cause.

Depression, tension, irritability, and nervousness are all symptoms of a mental or emotional disorder called neurosis. When you have a neurosis, you worry so much that it makes life difficult. The difficult thing about neurosis is there’s not something specifically wrong, like with a broken leg or type of cancer. Neurosis is a mental-health issue that can be minor or very serious. It's also very common, and many comedians have made fun of their own neurosis in their work.

Definitions of neurosis

n a mental or personality disturbance not attributable to any known neurological or organic dysfunction

neuroticism, psychoneurosis
show 4 types...
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hysteria, hysterical neurosis
neurotic disorder characterized by violent emotional outbreaks and disturbances of sensory and motor functions
anxiety neurosis
characterized by diffuse anxiety and often somatic manifestations of fear
anxiety hysteria
a form of hysteria having features of both conversion disorder and anxiety neurosis
hysteria with cataleptic symptoms
Type of:
disturbance, folie, mental disorder, mental disturbance, psychological disorder
(psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness

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