Most of us have met someone whose moods, relationships or sense of self seem to run on a different set of rules. A friend who keeps the people they love at arm’s length. A relative who reads insult into every comment. A partner whose closeness can flip to fury within minutes. We tend to file these patterns under personality or temperament and leave it there. Sometimes, though, the difficulty runs deeper than personality, and what looks like difficult behaviour is actually a treatable mental health condition.
Personality disorders are among the most misunderstood conditions in mental health, and that misunderstanding does real harm. People living with them are often labelled manipulative, dramatic or cold, when what they are actually carrying is long-standing distress in how they relate to themselves and to others. For families touched by addiction, this matters a great deal, because personality disorders and substance use problems often travel together.
What a personality disorder actually is
A personality disorder is an enduring pattern of thinking, feeling and behaving that sits well outside what a person’s culture expects, causes real distress, and gets in the way of everyday life. The pattern is stable over time and usually shows up by late adolescence or early adulthood. It tends to affect several areas at once: how a person sees themselves, how they handle emotions, how they cope with stress, and how they form and keep relationships.
The key word is pattern. Everyone has off days, sulks, or moments of suspicion. With a personality disorder, the way of relating to the world is consistent, long-lasting, and hard to shift on willpower alone. The National Institute of Mental Health notes that these conditions frequently sit alongside depression, anxiety, post-traumatic stress and substance use, which is one reason they can be tricky to recognise on their own.
It also helps to know that the way clinicians think about these conditions has shifted. The World Health Organisation’s ICD-11, the diagnostic system widely used in South Africa, has moved away from neat boxes towards a model based on how severely a person’s functioning is affected, mild, moderate or severe, alongside the traits that stand out most. In plain terms, the focus is less on slapping a single label on someone and more on understanding how much the difficulty is affecting their life and which patterns are driving it.
Common patterns people recognise
While the newer thinking leans towards severity and traits rather than fixed categories, the older categories are still useful shorthand for describing what families actually notice. None of these are something a person chooses, and none of them make someone a bad person.
Borderline patterns
This is one of the more widely discussed. People living with borderline traits often feel emotions very intensely, struggle with a shaky sense of who they are, and find relationships hard to keep steady. A deep fear of being abandoned can sit underneath a lot of the behaviour. Research points to a mix of genetics, brain differences and early trauma rather than any single cause. Borderline traits also carry a higher risk of self-harm, so this is one where professional support genuinely matters.
Narcissistic patterns
Behind what looks like arrogance or a constant need for admiration there is often a fragile self-image that bruises easily. People with these traits may dominate conversations or struggle to see things from another’s point of view, while privately feeling deeply insecure.
Avoidant patterns
Here the central thread is intense social anxiety and a sense of not being good enough. People avoid situations where they might be judged or rejected, which can leave them isolated and lonely. It is not unusual for this to sit alongside depression, anxiety disorders, or substance use as a way of coping.
Paranoid patterns
A pervasive distrust of others, including friends and family, sits at the centre of this one. Ordinary comments get read as criticism or hidden attacks, which makes closeness hard and conflict common.
Obsessive-compulsive personality patterns
This is a preoccupation with order, control and perfectionism that goes beyond being tidy or conscientious. It is worth saying clearly that this is not the same as obsessive-compulsive disorder, which involves intrusive thoughts and compulsions that the person usually finds distressing. The personality pattern is more about rigidity in how someone approaches work and life.
Why personality disorders and addiction often overlap
This is where the topic comes home for many of the families who reach out to us. Substance use and personality disorders co-occur often, and the reasons make painful sense. When someone struggles to regulate overwhelming emotions, sit with rejection, or quiet a restless mind, alcohol or drugs can feel like the only thing that works. Over time, what started as self-medication becomes its own problem, and the two conditions feed each other.
When a mental health condition and a substance use disorder exist together, clinicians call it a dual diagnosis. Treating only the addiction while leaving the underlying difficulty untouched tends to set someone up for relapse, because the original pain that drove the drinking or using is still there. This connection between drug addiction and mental health disorders is one of the most important things for families to understand, and it is a core reason proper assessment matters.
Can personality disorders be treated?
Yes, and this is the part that often gets lost under the stigma. Personality disorders are not a life sentence and they are not a character flaw. With the right support, people learn to manage intense emotions, build steadier relationships, and feel more at home in themselves. Progress tends to be gradual rather than sudden, but it is real.
Talking therapies do most of the work. Approaches like cognitive behavioural therapy and dialectical behaviour therapy, which was developed specifically with emotional regulation in mind, help people notice their patterns and respond differently. Where a substance use problem is also present, that has to be treated alongside the mental health side rather than in isolation. Medication can sometimes help with related symptoms such as depression or anxiety, though it is usually one part of a broader plan rather than the whole answer.
How to support someone you love
Watching a family member struggle with these patterns, especially when addiction is in the mix, can leave you feeling worn down and helpless. A few things tend to help.
- Try to separate the person from the pattern. The behaviour can be hard to live with, but it usually comes from real distress, not malice.
- Hold steady boundaries with warmth. You can care deeply about someone and still protect your own wellbeing.
- Avoid playing diagnostician. Noticing that something is wrong is different from labelling it, and a proper assessment needs a qualified professional.
- Look after yourself too. Support for families matters, and you cannot pour from an empty cup.
If you are not sure where to start, our piece on how to help a loved one struggling with addiction walks through some of this in more depth, and our overview of overcoming mental health problems may also help.
Frequently Asked Questions
Are personality disorders the same as other mental illnesses?
They sit within the broader family of mental health conditions but have their own character. Rather than coming and going in episodes, they tend to be long-standing patterns in how a person relates to themselves and others. They also frequently occur alongside conditions like depression, anxiety or substance use.
Does Freeman House treat personality disorders?
Freeman House Recovery is a drug and alcohol rehabilitation centre, so our focus is addiction. That said, addiction rarely travels alone. Where a substance use problem sits alongside an underlying mental health condition, our team carries out a psychiatric assessment and treats both together through our dual diagnosis approach. If a personality disorder is the primary concern rather than addiction, the right first step is a professional mental health assessment.
How do I know if it is a personality disorder or just a difficult personality?
You cannot know for certain without a professional assessment, and that is genuinely the honest answer. The general signpost is whether the patterns are long-standing, cause real distress, and consistently interfere with relationships, work or daily life. If that sounds familiar, it is worth speaking to a qualified clinician.
Where can I get help in South Africa?
The South African Depression and Anxiety Group offers free helplines and support across the country and is a good first call for mental health concerns. If addiction is part of the picture, you are welcome to contact us at Freeman House Recovery on +27 12 1111 739.
You do not have to work this out alone
If you recognise these patterns in yourself or someone you love, the kindest next step is not a diagnosis from the internet but a conversation with someone qualified to help. Where addiction is tangled up with deeper mental health struggles, treating both together gives the best chance of lasting change. Our team at Freeman House Recovery is here for that conversation whenever you are ready. You can reach us on +27 12 1111 739 or email info@freemanhouserecovery.com, with no pressure and no judgement.
