2 doctors weighed in:

What mental illness makes a person lie constantly, about everything, big and small?

2 doctors weighed in
Dr. Marc Zimmermann
Psychiatry
1 doctor agrees

In brief: None

Lying is the result of how an individual interacts with the world.
If one continually lies this may reflect a problem with self perception or not liking ones self. This can have many different causes. Psychotherapy is the usual treatment for this type of problem.

In brief: None

Lying is the result of how an individual interacts with the world.
If one continually lies this may reflect a problem with self perception or not liking ones self. This can have many different causes. Psychotherapy is the usual treatment for this type of problem.
Dr. Marc Zimmermann
Dr. Marc Zimmermann
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