Manipulative pathological liars: how to recognize them and protect yourself

At first, their stories fascinated you: an extraordinary past, prestigious connections, impressive projects. Then some details stopped adding up. A date changes, a qualification cannot be found, a friend has never heard of the anecdote. When you ask, they always have an answer, and you end up feeling guilty for having doubted them.

You may be wondering whether you are dealing with a manipulative pathological liar. This article helps you understand pathological lying, how it differs from manipulation, how to recognize it, how to respond to someone who lies constantly and, above all, how to protect yourself.

Pathological lying: an illness?

Pathological lying, also called mythomania, refers to a tendency to lie repeatedly, often by constructing stories that embellish reality or present the person favourably. In its most striking forms, it is also called pseudologia fantastica, a term psychiatrists have used for over a century.

Is it an illness? The answer is nuanced. Pathological lying is currently not a standalone diagnosis in the major psychiatric classifications. It is generally considered a symptom that may accompany various conditions, particularly certain personality disorders. A review presented in 2021 in European Psychiatry notes that the subject remains debated in psychiatry and that distinguishing ordinary lying from pathological lying is important.

Some researchers argue for clearer recognition. A study published in 2020 by Drew Curtis and Christian Hart describes pathological lying as persistent lying that often appears compulsive, sometimes grows from an initial lie and causes genuine distress and difficulties in the person’s life. To learn more about its origins and mechanisms, read our detailed article on pathological lying.

A pathological liar or a manipulator: what is the difference?

Not every pathological liar is a manipulator, and not every manipulator is a pathological liar. The difference lies in the function of the lie:

• For a “straightforward” pathological liar, lying mainly serves to enhance their self-image or fill a sense of emptiness or inadequacy. They may almost come to believe their stories. They often suffer from it themselves.
• For a manipulator, lying is a tool to obtain something: your admiration, money or dependence, or to evade responsibility for their actions.
• For a manipulative pathological liar, the two overlap: they construct a flattering image to charm you, then use lies to control, induce guilt and disorient you.

This last pattern does the most damage in a relationship because lying is more than a flaw: it becomes a way of operating aimed at maintaining control. It is frequently found in personalities described as narcissistic and abusive. See also our profile of the emotional manipulator.

How to recognize a manipulative pathological liar

Here are the most common signs. None is sufficient on its own; their accumulation should alert you.

In what they say

• Grandiose stories: they have always experienced exceptional things, known important people or nearly achieved extraordinary feats.
• Changing details: the same anecdote is told differently on different days or to different people.
• Ready-made answers: when you point out an inconsistency, they immediately have an explanation, often a complicated one.
• A past that is difficult to verify: few witnesses, loved ones who have “fallen out” with them or “moved far away”.

In how they react

• Strong indignation when questioned: “Are you calling me a liar? After everything I do for you?”
• Reversing the roles: you become the suspicious, jealous or paranoid one.
• Gaslighting: they deny saying what they said and make you doubt your memory. Our article on gaslighting phrases provides many examples.
• Tears or playing the victim when they are found out.

In the relationship

• you often feel confused, as if reality keeps shifting;
• you check and look for evidence, then resent yourself for doing so;
• your loved ones are concerned or have stopped believing them;
• financial matters remain unclear: debts, loans or projects that never materialize.

Narcissistic pathological lying: why the connection is so common

A narcissistic pathological liar often lies to protect an idealized self-image. Admitting a mistake, failure or weakness is unbearable, so they prefer to rewrite reality. They also lie to obtain the admiration they need. In a relationship, lying becomes an instrument of control: they know what they told you, while you no longer know what is true. Women can also behave this way, as illustrated in our article on the narcissistic female manipulator.

Be careful not to conflate everything: some people with psychiatric conditions may make inaccurate statements without intending to deceive. Our article bipolar disorder, manipulation or lying? helps distinguish them.

How to unsettle a pathological liar and, above all, protect yourself

Many people try to “catch out” the liar and make them confess. This is understandable, but often exhausting and ineffective: they are used to evasion. It is better to aim for your own stability than their confession. Here is a seven-point approach:

1. Trust facts, not words. What they do matters more than what they say. Observe the consistency between the two.
2. Keep records. Note dates, promises and successive versions. Save messages. This protects you from doubt and gaslighting.
3. Ask precise, calm questions. “Which day? With whom?” Lies struggle against concrete details. But do not turn it into a constant interrogation.
4. Do not justify having doubted them. Doubting inconsistencies is healthy. One sentence is enough: “What you are saying does not match what I know.”
5. Refuse endless debates. If the discussion goes in circles and you end up accused, stop it: “I am not going to continue this conversation.”
6. Protect your finances and documents. Do not lend money without a written record, do not sign anything under pressure and retain access to your accounts.
7. Talk to someone outside the relationship. A loved one, professional or support organization: an outside perspective helps you stay grounded in reality.

For more practical responses to lying, see our guide to the emotional manipulator.

Checklist: are you in a relationship with a manipulative pathological liar?

• ☐ Their stories change depending on the day or the person.
• ☐ I cannot verify much of what they have told me.
• ☐ When I doubt them, I end up apologizing.
• ☐ I often feel confused after our discussions.
• ☐ Financial matters remain unclear or unresolved.
• ☐ My loved ones have expressed doubts about them.
• ☐ Their apologies, when there are any, change nothing.

How is pathological lying treated?

A person who lies pathologically may improve if they acknowledge the problem and begin psychotherapy. The initiative must come from them: you cannot get better on their behalf. Therapy often addresses self-esteem, shame and the need for recognition. Our article on pathological lying and recovery explores these approaches. When lying mainly serves manipulation and the person sees no problem with their behaviour, the prospects for change are lower.

Health note: if you have questions about your own lying, do not hesitate to consult a psychologist or psychiatrist. It is not shameful; it is a first step. If the relationship has left you anxious, exhausted or depressed, speak to your doctor. In case of danger, in France: 3919, 17 or 112.

Frequently asked questions

Does a pathological liar know they are lying?

Usually yes, at least at the moment they lie. However, some come to believe their stories so strongly that the boundary becomes blurred for them too.

Is there a test for pathological lying?

There is no reliable online test. Only a professional can assess pathological lying, taking the person’s history and any associated conditions into account.

Should you confront a pathological liar?

You can calmly state the facts, but expect denials or a counterattack. Confrontation mainly serves to assert your position, rather than obtain a confession.

Can a manipulative pathological liar change for love?

Love alone is not enough. Lasting change requires awareness and therapeutic work by the person themselves.

Conclusion

Living with a manipulative pathological liar means living in a constant fog. You have the right to want the truth and, above all, the right to protect yourself. Trust the facts, keep records, seek support and remember that your doubts were legitimate. If you would like help to emerge from this fog, discover support for victims of narcissistic abuse.

Sources

• Curtis D. A. and Hart C. L., “Pathological Lying: Theoretical and Empirical Support for a Diagnostic Entity”, Psychiatric Research and Clinical Practice, 2020: PMC9176035
• Valadas M. T. and Freitas R. M., “Lying in psychiatry: A review”, European Psychiatry, 2021: PMC9475576
• Service-Public.fr, “Domestic violence”: service-public.gouv.fr