Why Are More Women Than Men Diagnosed with Borderline Personality Disorder?
Borderline Personality Disorder affects emotions, relationships, identity, and behaviour, and it can cause intense distress in people of any gender. Yet in clinical settings, most of the people diagnosed with BPD are women. For many years, this has created the impression that BPD is mainly a women’s condition. But newer research suggests the picture may be more complicated. Men may experience BPD just as often in the wider population, but their symptoms may be noticed differently, labelled differently, or missed altogether. This matters because when a condition is misunderstood through the lens of gender, many people do not get the right help at the right time.
Why this question matters
At first sight, the numbers seem simple. In mental health services, women with BPD are diagnosed far more often than men. In many clinics and hospital settings, around 70% to 75% of diagnosed cases are female.
But that does not automatically mean BPD truly affects women far more often. When researchers look at people in the general community, including those who may never have asked for help, the gap between men and women becomes much smaller. In some studies, the rates are roughly equal.
This raises an important question. Are women truly more likely to have BPD, or are men with BPD being missed, misunderstood, or given other labels instead?
This is not only about statistics. It affects real people. If men are not being recognised properly, they may go untreated for years. If women are being recognised only through narrow stereotypes, they may also be misunderstood in ways that increase stigma rather than help.
The gender gap in diagnosis may not mean that BPD is mostly a women’s condition. It may also mean that men are being missed.
BPD may look different in men and women
Men and women may share the same core disorder, but it can show itself differently in everyday life. This is one reason diagnosis becomes complicated.
Women with BPD are often more likely to internalise distress. That means they may turn their pain inward. They may feel empty, worthless, depressed, anxious, or deeply ashamed. They may withdraw, self-harm, develop eating problems, or become overwhelmed in relationships.
Men with BPD are more often described as externalising distress. Their emotional pain may come out through anger, substance misuse, aggression, reckless behaviour, or conflict with other people. The suffering underneath may be just as intense, but the outside presentation looks different.
Because of this, women may be more likely to arrive in therapy or hospital settings where BPD is recognised, while men may be more likely to be seen through the lens of behaviour problems, addiction, violence, or crime.
That can shape diagnosis in powerful ways.
Women are often seen as emotionally unstable, while men are often seen as angry or dangerous
The same underlying pain can be interpreted very differently depending on gender. A woman who is deeply distressed, self-harming, terrified of abandonment, and emotionally volatile may be seen as fitting the familiar picture of BPD.
A man with the same deep fear of rejection and emotional instability may instead be seen as aggressive, antisocial, narcissistic, or simply difficult. His impulsivity may be treated as bad behaviour rather than emotional desperation. His rage may be recognised, while his vulnerability is overlooked.
This is important because both responses can be harmful. Women may be dismissed as “too emotional” or “unstable.” Men may be treated as threatening rather than distressed. In both cases, stereotypes replace proper understanding.
When this happens, gender shapes not only how people are viewed, but what care they are offered.
The same disorder may be seen as emotional instability in women and as aggression or bad behaviour in men.
Men may be underdiagnosed or misdiagnosed
If BPD appears at similar rates in the general population, then one likely explanation for the imbalance in clinics is that many men with BPD are not receiving that diagnosis.
Instead, they may be diagnosed with antisocial personality disorder, narcissistic personality disorder, substance misuse disorders, anger problems, or other conditions. Some may receive no personality diagnosis at all, even though the emotional pattern underneath is consistent with BPD.
This matters because the diagnosis shapes treatment. If a man with BPD is treated only as aggressive, disruptive, or addicted, the deeper problems of abandonment fear, emotional instability, unstable identity, and relationship pain may not be addressed.
He may then continue to struggle without understanding why things keep falling apart.
So the question is not simply whether men have BPD. It is whether professionals are trained to see it when it does not look like the version they expect.
Help-seeking patterns also affect who gets diagnosed
Another reason for the gender imbalance may be that women are generally more likely than men to seek mental health help. This does not mean women suffer more. It means they may be more willing, or more permitted by social expectations, to talk about emotional pain and enter treatment.
Many men are taught from an early age to appear tough, independent, and controlled. Admitting emotional vulnerability may feel shameful, weak, or unsafe. Some men may only come into services after crisis, addiction, relationship collapse, or legal trouble.
By then, their difficulties may be seen through a different lens. The focus may land on their behaviour rather than the emotional pain driving it.
This means diagnosis is shaped not only by symptoms, but by culture. If one gender is more likely to seek therapy and another is more likely to hide distress until things explode, the diagnostic picture becomes skewed.
Who gets diagnosed depends partly on who gets seen, and who gets seen depends partly on who feels able to ask for help.
Diagnostic tools may have been shaped around female presentations
Another important point raised by researchers is that many diagnostic ideas and tools for BPD were developed mainly from female clinical samples. In other words, the picture of BPD that professionals were trained to recognise may have been built more from women’s presentations than men’s.
If that is true, then men may not fit the expected pattern as easily, even when they are suffering from the same underlying disorder. The system may be better at recognising inward distress than outward distress when it comes to BPD.
This creates a loop. If more women are diagnosed, research focuses more on women. If research focuses more on women, the definition becomes more shaped by female cases. Then men continue to be missed.
This does not mean the current diagnosis is wrong. It means it may be incomplete if it does not fully capture how BPD appears across genders.
Biology may play a part, but it is not the whole story
Researchers are also studying whether there are real biological differences in how BPD develops or appears in men and women. Early findings suggest there may be some differences in brain structure and function, although this area is still developing and should be interpreted carefully.
For example, some studies suggest that women with BPD may show reduced volume in areas such as the amygdala and hippocampus, which are involved in emotion and memory. This may relate to emotional sensitivity, intense reactions, and difficulty regulating feelings.
Some findings suggest that men with BPD may show differences in areas linked to impulse control and decision-making, such as the anterior cingulate cortex. This might help explain why explosive behaviour, impulsive actions, or risk-taking may appear more often in some men.
Hormones may also play a role. Oestrogen, testosterone, and other biological factors may shape emotional responses and behaviour in different ways.
But biology alone cannot explain the full picture. Social expectations, trauma, upbringing, and cultural ideas about gender all interact with biology. The condition does not develop in a vacuum.
Biology may influence how BPD looks, but gender expectations and life experience also shape who gets recognised and how.
Social expectations can hide emotional pain in men
Cultural ideas about masculinity can make BPD especially hard to recognise in men. Many boys grow up hearing messages such as “man up,” “don’t cry,” or “deal with it.” These messages teach them that sadness, fear, and emotional need are not acceptable.
As a result, emotional pain may come out in ways that seem more socially permitted for men, such as anger, risk-taking, detachment, or substance use. A man who is actually terrified of abandonment may never use those words. Instead, he may lash out, disappear into alcohol, or behave recklessly.
If professionals do not look beneath the surface, they may miss the emotional meaning of the behaviour.
This is one reason stigma matters so much. It does not only silence men. It changes how their distress appears.
Women may be more visible in services, but that does not always mean they are better understood
Although women are diagnosed more often, this does not mean the system serves them well. Women with BPD often face harsh judgement too. They may be labelled manipulative, dramatic, unstable, or difficult. Their pain may be dismissed or stigmatised even when the diagnosis is accurate.
So the problem is not only that men are missed. It is also that women are sometimes recognised through unhelpful stereotypes. A diagnosis should lead to better understanding and better treatment, not more blame.
That is why a gender-sensitive approach matters. It should help clinicians recognise different presentations without reducing people to clichés.
The goal is not to say women suffer one way and men suffer another in every case. The goal is to stay open to the many ways emotional pain can look.
Women may be diagnosed more often, but diagnosis does not always protect them from stigma or misunderstanding.
What needs to change in diagnosis and treatment
Researchers are calling for a more gender-sensitive approach to BPD. This does not mean inventing separate disorders for men and women. It means widening the lens so professionals can recognise the full range of how BPD presents.
Mental health staff need training that helps them notice both internalised and externalised distress. Screening tools should be reviewed to make sure they do not overlook people whose symptoms appear in less expected ways. Services should also feel safe and accessible for men, who may otherwise avoid emotional support until things become severe.
At the same time, public understanding needs to improve. Parents, teachers, partners, and friends should know that BPD does not always look the same. Some people turn pain inward. Others push it outward. Both may need urgent help.
Early recognition matters for all genders, especially in adolescence, because the sooner appropriate support begins, the better the long-term outlook may be.
Why this matters for families and carers
For carers and loved ones, this research offers an important message: do not rely only on stereotypes when trying to understand distress. A young woman who self-harms and feels empty may be showing one face of BPD. A young man who drinks heavily, explodes in anger, and sabotages relationships may be showing another.
Both may be struggling with the same deep fears of rejection, unstable identity, emotional instability, and impulsive coping.
Families who understand this may be more likely to encourage proper assessment instead of focusing only on the surface behaviour. That can make a major difference, especially for men who might otherwise be seen only as troublesome or aggressive.
It can also reduce blame. When people understand that emotional suffering can look different depending on gender, they are often better able to respond with compassion and clear support.
Emotional suffering does not always look soft or vulnerable. Sometimes it looks angry, reckless, or shut down.
A more balanced future is possible
This newer research points toward a more balanced understanding of BPD. It suggests that the diagnosis gap between women and men may say as much about our systems and assumptions as it does about the disorder itself.
If professionals become better at recognising BPD in men, and if services become safer places for men to seek help, the gender gap in diagnosis may begin to narrow. At the same time, if women are treated with more understanding and less stigma, diagnosis may become more useful and less damaging for them too.
The larger lesson is that gender matters in mental health, but not in a simplistic way. It shapes how distress is shown, how it is interpreted, and whether it receives the right response.
When we challenge outdated assumptions, we create a better chance that everyone with BPD can be seen and helped properly.
Conclusion
More women than men are diagnosed with Borderline Personality Disorder in clinical settings, but that does not necessarily mean women are the only ones, or even the main ones, affected by it. Research suggests that men and women may experience BPD at similar rates in the wider population, while differences in help-seeking, gender expectations, diagnostic tools, and symptom presentation all influence who gets recognised.
Women may be more likely to internalise distress and come into services where BPD is recognised. Men may be more likely to externalise distress and be labelled in other ways, or missed altogether. Biology may play a part, but culture and bias matter too.
A more gender-sensitive approach could improve diagnosis, treatment, and support for everyone. And that matters because BPD is painful enough without people also having to fight stereotypes before they can be understood.
Understanding gender differences in BPD is not about dividing people. It is about recognising suffering more accurately so that more people can get the help they need.
Source note
This article is adapted from a 2024 review published in Frontiers in Psychiatry on gender differences in Borderline Personality Disorder and how these differences affect diagnosis and treatment.