Thairath Online
Thairath Online

Habitual Lying: Causes, Warning Signs, and Treatable Mental Conditions

Life18 Jun 2026 11:46 GMT+7

Share

Habitual Lying: Causes, Warning Signs, and Treatable Mental Conditions

Have you ever encountered someone who lies habitually and constantly fabricates stories? This article explains the medical reasons behind this behavior, whether it is a mental condition that can be inherited, and how to safely recognize and handle it.

Have you ever wondered why some people can lie naturally and so frequently that it becomes part of their daily lives? In psychology and medicine, habitual lying is not merely a survival tactic in specific situations but may be linked to complex mental states and neurological systems.

Thairath Online takes you deep into understanding this behavior’s root causes, whether it is a mental illness, and how we can protect ourselves from such individuals.

Understanding "Habitual Lying" (Pathological Lying): What is it?

In medicine, individuals who lie persistently over long periods are described as exhibiting Pathological Lying or Pseudologia Fantastica, sometimes also called Mythomania.

ภาพจาก iStock

This behavior differs from ordinary lies (White Lies) or lies told to survive because habitual liars often create entirely fabricated stories, usually "without clear triggers or motives." Their lies tend to be complex, dramatic, or exaggerate their own situation to appear better or more pitiable, sometimes to the extent that the liar begins to believe their own fabrications.

Medical explanations for habitual lying: What causes it?

Psychological studies abroad indicate that this behavior mainly arises from two factors:

1. Psychological and environmental factors

Low self-esteem: Liars often feel they lack worth, so they invent stories to appear interesting, gain acceptance, or elicit sympathy from others.

  • Childhood trauma: Some grew up in overly strict families or experienced traumatic events, leading them to use lying as a defense mechanism to avoid painful realities.

2. Neurobiological factors

Scientific brain studies observe that habitual liars often have greater density of white matter in the prefrontal cortex than normal individuals. This brain region governs social behavior and impulse control, enabling them to connect and fabricate lies more quickly and convincingly.

Is it a mental disorder or genetically inherited?

According to the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), habitual lying is "not classified as a standalone psychiatric disorder" but is identified as a "symptom or."a warning sign" of personality disorders such as

  • Antisocial Personality Disorder,
  • Histrionic Personality Disorder,
  • and Narcissistic Personality Disorder.

Is it genetically inherited?

Medical experts state that no specific gene directly passes on lying behavior. However, genetic transmission may involve "risk factors for psychiatric disorders" or "basic personality traits" which, combined with upbringing and environment, can foster habitual lying.

How to recognize "habitual liars"

If you suspect someone close to you exhibits this behavior, watch for these warning signs:

ภาพจาก iStock

  • Exaggerated and inconsistent stories: Their narratives are often grandiose, dramatic, or overly pitiable, with details changing upon retelling.
  • Lying about unnecessary things: They frequently lie about trivial matters without benefit or need.
  • Anger or evasion when caught: When confronted with evidence, they often become irritable, change the subject, or create new lies to escape.
  • Lack of guilt: They show no remorse or regret when the truth is revealed.

How to handle and protect yourself from habitual liars

Living or working with habitual liars can harm your mental health, so it’s important to maintain some distance and follow these strategies:

  • Avoid harsh confrontation: Strongly accusing or trying to catch them out often backfires as they will fabricate more lies. Instead, engage calmly and stick to facts.
  • Set boundaries: Do not share important, personal, or financial information with them to prevent misuse or distortion.
  • Verify information consistently: When collaborating, rely on tangible documents and written communication rather than verbal statements.
  • Suggest compassionate medical help: If it’s a family member, talk with empathy and encourage them to see a psychiatrist for treatment.

Can this behavior be treated?

Habitual lying can be treated and improved, but the biggest challenge is that "patients often do not acknowledge their problem."

Current main treatment approaches include

  • Cognitive Behavioral Therapy (CBT): Helps patients understand the root causes of their lying, adjust their thinking, and learn straightforward communication methods.
  • Medication: When lying behavior stems from other underlying conditions like depression, ADHD, or anxiety, doctors may prescribe drugs to treat those primary disorders alongside.