If, like me, you pride yourself on being honest (perhaps even a little too honest at times), it can be hard to get your head around why people lie. Especially when it hurts.
We tend to reach for the easy answer at times like these: they’re simply a bad, immoral person.
But the reality is usually far more complicated than that. And as always, understanding the psychology behind it can be very illuminating.
1. They were taught to lie (but not always directly).
Before we judge the liar, it’s worth asking who taught them.
Because for many chronically dishonest people, lying wasn’t a choice they made; it was a behavior they absorbed the way children absorb everything: subtly, completely, and often without realizing it was even happening.
Imagine growing up in a household where a parent routinely called out, “Tell them I’m not home!” Or where the unspoken family rule was that certain things simply were not to be discussed.
Children raised in these environments don’t learn that lying is wrong; they learn that it’s functional. A normal tool for navigating life.
And some people reading this will probably say it is. And I guess it is, in some circumstances. But to a child witnessing lying, it can be hard to know which circumstances those are, and which they aren’t.
Then there’s the other side of it. Some children told the truth and were met with rage, humiliation, or consequences so severe that honesty stopped feeling like a virtue and started feeling like a trap.
If you once handed your parent a bad school report and the fallout was nuclear, but the next time, you hid it, forged a signature, and nothing happened, the lesson likely landed hard and fast.
And if the psychology of social learning has taught us anything, it’s that those patterns can be very hard to unlearn.
2. They have a deep fear of conflict.
Some people do not lie to manipulate. They lie because the alternative feels unbearable. That might be a difficult conversation, a moment of confrontation, or the look on someone’s face when they hear something they didn’t want to hear.
For conflict-avoidant liars, the lie isn’t a weapon. It’s a shield. And if you’ve ever said, “I’m fine” through gritted teeth, or gushed “I love it!” over a gift you’d never use, then you already understand the impulse, even if not the extent.
What makes this pattern particularly tricky is how quickly it escalates. A small lie told to keep the peace needs another lie to protect it. Then another. And another.
Before long, the conflict-avoidant person is maintaining an elaborate structure of dishonesty that started with something completely trivial and now feels impossible to undo without causing the very confrontation they were trying to avoid.
For people with anxiety, psychology teaches us this is especially relevant. The lie often comes before conscious thought, a reflexive, self-protective response to anticipated conflict.
Essentially, the body decides before the brain catches up. And in order to interrupt that automatic reaction, you need to develop a level of self-awareness that most people struggle with.
3. They have a fragile sense of self.
There are people who lie about what they did. And then there are people who lie about who they are.
That second group is operating from a much lonelier, more painful place.
When someone fundamentally believes the real version of themselves isn’t interesting enough, successful enough, or worthy enough, they begin editing themselves for public consumption.
It often starts small. Perhaps a slightly exaggerated job title at a dinner party or a travel story with a few extra embellishments. But over time, it becomes instinctive.
The unvarnished truth of their life feels too ordinary, too exposing, to offer up without decoration.
What’s particularly heartbreaking about this pattern is the sheer exhaustion of it.
Maintaining a false self means living with constant background anxiety: “What if they find out who I really am?” This drives even more performance, more embellishment, and more distance from the authentic self.
According to psychology, this kind of behavior often traces back to a childhood where the person never felt truly accepted for who they actually were. Where love or approval felt conditional. Where being enough required constant effort.
And decades later, the habit of self-editing remains, even when the original threat is long gone.
4. Lying has always worked for them.
Behavior that gets rewarded gets repeated. A lot of the time, it really is as simple as that.
Some people discovered early (perhaps very early) that they were naturally convincing. Teachers believed them. Parents believed them. Friends believed them.
And rather than this talent being redirected, it went unchallenged, reinforcing itself year after year.
For example, consider a child who spins a completely convincing story about why their homework wasn’t done, watches the teacher nod sympathetically, and feels that small private bloom of it worked.
They learn something powerful: dishonesty is effective. More effective, in fact, than the truth would have been.
What’s interesting about people in this category is that they often don’t think of themselves as liars. They think of themselves as persuasive. Strategic. Good at thinking on their feet.
The ethical dimension gets so thoroughly stripped away through years of consequence-free dishonesty that it barely registers.
The problem, of course, is that the stakes tend to grow.
What worked effortlessly at twelve gets deployed at thirty-five in situations with far higher consequences. In relationships, in workplaces, in places where the fallout of being caught is no longer just a detention, but an impact on other people’s lives.
5. They can’t tolerate shame.
Many people confuse guilt and shame, and the difference is important.
Guilt says, “I did something bad.” Shame says, “I am bad.”
They feel different. They drive different behaviors. And shame, in particular, can make honesty feel like an almost life-threatening proposition to some.
For a person who is deeply shame-prone, admitting to a mistake isn’t just uncomfortable; it’s an encounter with their worst fear about themselves.
It feels like a confirmation that they are fundamentally defective. Not someone who simply got something wrong, but someone who is wrong.
You can understand why someone would lie when that’s how they view themselves.
Neuropsychology research shows us this pattern is often rooted in environments where shame was used as a disciplinary tool. Where mistakes weren’t addressed with correction and reassurance, but with humiliation. Children who were regularly shamed grow into adults with an almost allergic reaction to being at fault.
Interestingly, from the outside, this can look like arrogance.
It’s the person who never admits they were wrong, who twists the narrative, who turns things around so that somehow you’re the one who needs to apologize.
But underneath all the bravado, that person may not be as confident as they appear. Very often, deep down, there’s someone who simply cannot bear to sit in the feeling of having failed.
6. They’ve stopped believing honesty matters.
Not all dishonesty is driven by fear or pain. Some of it is the result of something more subtle and insidious: a gradual psychological process called moral disengagement.
It often starts with a small lie that costs nothing. So another lie follows in time. And with each lie told, the internal moral compass recalibrates, just a fraction, helped along by a set of automatic thought patterns (that will probably sound very familiar):
“It’s just a little white lie.” “Everyone does it.” “They would have done the same to me.” “The industry is like this.” “At least I’m not as bad as X.” “They deserved it.”
These generally aren’t conscious, deliberate justifications. They’re automatic, self-protective rewrites that reduce the cognitive dissonance they are feeling. They make the behavior feel acceptable, even reasonable, in the moment.
And the neuroscience happening here is fascinating. Each time we lie, the discomfort we feel measurably weakens. A study published in Nature Neuroscience found that the amygdala (that’s the brain’s emotional alarm system) becomes progressively desensitized to dishonesty with each lie told.
It genuinely does get easier to lie, not because someone becomes more malicious, but because the internal warning system has been turned down.
Eventually, the person simply stops identifying as someone who values honesty at all. The behavior shapes the identity. And by that point, there’s no internal reason left to resist it.
I don’t know about you, but I find this particular psychological insight pretty disturbing.
7. They’re addicted to the thrill of it.
Not every liar is running from something. Some of them are running toward something — specifically, the rush that comes with successfully deceiving another person.
Yes, really.
Believe it or not, deception activates the brain’s reward pathways in ways that mirror other risk-taking behaviors, particularly in those drawn to risk and novelty.
Getting away with a lie produces a small hit of dopamine, a buzz of having navigated a situation others couldn’t see through. For certain personalities, that feeling becomes compelling in its own right, entirely separate from whatever the lie was about.
This type of liar is often highly charming and socially adept — because they’ve spent years honing the performance and, on some level, genuinely enjoy it.
They may not even have a particular agenda. The lie is the point. The secret is the point. The gap between what they’ve presented and what’s actually true is where they feel most alive.
8. Undiagnosed or untreated mental health challenges may be playing a role.
This point deserves real care, because the connection between mental health, neurology, and dishonesty is frequently misunderstood.
And probably one of the most stigmatized conditions involved here is Borderline Personality Disorder (BPD).
BPD is characterized by intense emotional dysregulation and a profound, often overwhelming fear of abandonment. And although the connection might not seem immediately clear, both can drive dishonesty.
For example, someone with BPD might lie to prevent a relationship rupture they sense coming, even when the threat isn’t real.
They may exaggerate emotional distress because the plain truth doesn’t feel adequate to convey what they’re actually experiencing internally. Or they may deny it entirely, concealing how they really feel to avoid being seen as “too much.”
There’s also a feature of BPD called splitting, that is, a tendency to see situations, and importantly, people, as either all good or all bad. And for this perception to shift rapidly.
This can produce accounts of events that feel completely genuine to the person telling them, but are heavily distorted by whichever lens, or “split,” they’re currently viewing the individual or situation through.
These behaviors can seem manipulative, but it’s often a person doing whatever they can to hold themselves, and their relationships, together.
Addiction is another common culprit because it fundamentally alters the brain’s prefrontal cortex (responsible for decision-making, impulse control, and moral reasoning) while simultaneously hijacking the dopamine reward system.
The result is that the brain begins to prioritize the addictive substance or behavior above all else — including honesty with the people they love most.
This means the lying isn’t simply a choice being made. The very part of the brain responsible for weighing up the ethics of that choice has been compromised.
Unfortunately, that doesn’t make it any easier for the families of people in active addiction, who consistently describe the lying as one of the most painful elements of the experience.
9. They don’t feel the impact of their lies on others.
Most of the psychological profiles in this article describe people whose dishonesty is rooted in something recognizably human, for example, fear, shame, pain, self-protection.
Not this one.
For some people, lying carries no emotional weight because the impact on others simply doesn’t register.
There is no sleepless night. No gnawing guilt. The lie was useful, or convenient, or the path of least resistance. For some, that’s simply how it is.
The reasons for a lack of empathy are varied, but as with most things, it’s usually an interaction between genetics and environment.
On the environmental front, trauma or abuse, long-term substance abuse, and the sustained moral disengagement we talked about earlier can all gradually erode the capacity to register the impact of our behavior on others.
Genetics are particularly important when it comes to personality disorders associated with a lack of empathy, such as narcissistic personality disorder and antisocial personality disorder, but even so, the role of environment can’t be understated here.
What tends to look similar across all people who lack empathy is the behavior when confronted: gaslighting, and a pattern called DARVO: Deny, Attack, Reverse Victim and Offender.
Essentially, when confronted about the lie, it ends with them somehow being painted as the injured party.
10. It’s become pathological.
All of the profiles described in this article represent different points on a spectrum of sorts.
But there is an endpoint to that spectrum — a place some people arrive at when one or more of these patterns goes unchecked for long enough.
Psychologists call it pseudologia fantastica, though it’s more commonly referred to simply as compulsive or pathological lying.
What distinguishes it from everything else on this list is that the lying has completely detached from any conscious purpose.
It no longer requires fear to trigger it, or shame to fuel it, or reward to sustain it. The original driver — whatever it once was — has long since dissolved.
The behavior simply remained, and then kept going. The internal alarm system we talked about earlier has effectively gone offline.
The result is someone who lies about things with no stakes whatsoever and for no discernible reason, for example, what they had for lunch, whether they’ve seen a film.
When challenged, they genuinely cannot explain it.
It’s worth saying: people don’t generally start here. This is where certain roads lead when nothing interrupts the journey.
Final thoughts…
Understanding why someone lies doesn’t mean accepting the damage their dishonesty causes.
Someone’s behavior may be rooted in pain, but that doesn’t mean you have to stay in the path of it.
Knowing that can help you to have boundaries, while still setting the boundaries needed to protect yourself. It allows you to not take it personally.
And if you’re someone who recognizes themselves in these behaviors and doesn’t like what they see, know that awareness is already a powerful first step. These things may be the making of a dishonest person, but in some cases, they can still be unmade.
