How to deal with a family member with borderline personality disorder

To support a family member with borderline personality disorder, listen to their experience, agree on clear limits, and encourage professional support. Discuss difficult issues when you are both calmer. Make a plan for crises, and get support for yourself. You can care deeply without becoming responsible for another person’s recovery.

I want to start with the person typing that search. Perhaps you have just heard the diagnosis. Perhaps you love someone and dread another difficult conversation. You may be frightened, angry, or simply unsure what would help.

There is room for those feelings here. There must also be room for your family member to be a whole person, with opinions, interests and a life beyond BPD.

My starting point is that both people matter. Advice that asks you to absorb every hurt is inadequate. So is advice that turns a psychiatric diagnosis into a verdict on someone’s character.

About this guide: This is general information about family relationships, not individual treatment advice. The conversations below are illustrative examples, not accounts of Jessica’s family. If someone is in immediate danger, contact your local emergency service; crisis contacts appear below.

Understand BPD without explaining everything through it

Borderline personality disorder can affect emotional regulation, a person’s sense of themselves and their relationships. Some people experience intense fears of abandonment, impulsivity or self-harm. The combination and severity of symptoms vary. A diagnosis does not tell you how any particular conversation will unfold. The National Institute of Mental Health’s BPD overview is a useful place to begin.

I would be wary of using a symptom list to diagnose a relative after an argument. BPD needs professional assessment. Even with an established diagnosis, a complaint may be entirely reasonable: perhaps you did interrupt, break an agreement or dismiss something that mattered.

Ask what happened before deciding what the diagnosis explains.

I also reject the idea that everyone with BPD behaves abusively. Where someone does cause harm, that harm deserves attention. Where they express disagreement, disappointment or anger, they deserve the same chance to be heard as anyone else.

What to say when a conversation becomes difficult

When emotions are running high, an exhaustive defence of your intentions may be more than either of you can manage. Mind’s guidance for friends and family recommends listening without judgment and waiting until things are calmer to work through disagreements.

Try acknowledging the feeling you hear. Leave room to be corrected:

“It sounds as though you felt left out. Have I understood that?”

Suppose a sibling says you do not care because you left a family gathering early. You might answer:

“I hear that you wanted more time together. I left because I was exhausted. I can talk for a while tomorrow afternoon.”

You have acknowledged the disappointment and explained your decision. You have not agreed that you do not care.

In its family support resource hosted by ASmile, Spectrum distinguishes accepting someone’s feelings from accepting every behaviour. That distinction is useful when validation starts to feel like surrender.

I would avoid announcing, “I’m validating your emotions now.” Most of us would rather be spoken to than managed through a technique. Use ordinary words you mean. If you do not understand, say so kindly: “I want to understand what made that so painful.”

And if you did something hurtful, apologise specifically. “I shared your news without asking. I’m sorry” takes responsibility. Adding “but you overreacted” immediately shifts the conversation away from what you did.

Set boundaries you can actually keep

I find a boundary more useful when it describes an action within your control. “You must never get upset with me” asks the impossible. A limit on what you will do is clearer.

Here are possible starting points, to adapt to your circumstances:

• During an insulting phone call: “I want to hear what upset you. If the insults continue, I’ll end this call. We can try again tomorrow.”
• About money: “I can help you look at the bill, but I cannot lend money this month.”
• About availability: “I don’t usually read messages while I’m working. I’ll check them after six. We need other support options for anything urgent.”

Discuss expectations outside an argument where possible. BPD Australia’s family guidelines emphasise clear limits and realistic expectations. A boundary introduced as a punishment in the middle of a fight is a different conversation from a limit everyone has had a chance to understand.

If you take a break, explain when you intend to reconnect, provided that doing so is safe. Avoid promising a return time you cannot keep. If plans change, communicate that.

No wording guarantees a calm response. A reasonable limit may still upset someone; that does not automatically make it wrong. Equally, calling something a boundary does not make it reasonable. Demanding someone’s passwords or control over their friendships deserves scrutiny, whatever diagnosis either person has.

Your role changes the kind of support you can offer

A parent supporting an adult child has different responsibilities from a teenager living with a parent. I would not give them identical advice.

If your adult child has BPD

Offer help with specific tasks and ask permission before taking them over. “Would you like company while you call?” leaves the decision with them. Arranging everything without discussion can remove choices they want to make themselves.

You can discuss what financial or practical help is possible without making their whole life a treatment project. Agree on your contribution, including its limits, rather than assuming an open-ended responsibility.

If your parent has BPD

You are allowed a life outside your parent’s emotional needs. If you are a child or teenager, you should not have to become their crisis manager. Tell a trusted adult, school counsellor or health professional if you feel frightened or responsible for keeping your parent safe.

As an adult child, you might choose shorter visits, agreed calling times or support from someone outside the family. Make decisions around the behaviour affecting you and the support available.

If your sibling or partner has BPD

Being close does not automatically make you the family spokesperson. Discuss what your relative wants shared, who can offer practical help and which conversations should remain private.

I would also protect some time together that has nothing to do with symptoms. A meal, a game or a shared television programme can simply be time together. CTRI’s guidance on supporting someone with BPD includes enjoyable shared activities and recognising the person’s strengths. Relationships need more content than appointments and arguments.

Offer help with treatment, including the obstacles to getting it

There is reason for hope. The American Psychiatric Association’s updated BPD treatment guideline recommends structured, evidence-supported psychotherapy. It identifies several effective approaches rather than one universally superior therapy. Medication, when used for BPD, should target specific symptoms and supplement psychotherapy; treatment decisions belong with the person and their clinician.

I would begin with a question: “What would make getting support easier?”

The answer might involve money, transport, a waiting list, an inaccessible service or a previous experience of being dismissed. Ask before interpreting a missed appointment as a lack of interest in getting better.

Depending on what they want and what you can offer, practical help could mean comparing local services, providing a lift or helping write questions for an appointment. Ask whether they want you involved in discussions with their clinician, and respect their privacy.

If they decline help, you can explain your concerns without turning every interaction into a campaign. Seek guidance for yourself and keep appropriate limits. Immediate safety concerns need a different response, addressed below.

Know when this becomes a safety issue

Talk about a crisis plan when things are relatively settled. With your family member and, where possible, their treating professional, identify warning signs, preferred support people and services to contact. Clarify what to do if the usual person is unavailable.

Take talk of suicide or self-harm seriously, including when it happens during conflict. Ask directly whether the person is thinking about suicide. Asking does not increase suicidal thoughts or behaviour, according to NIMH’s suicide-prevention guidance.

If an attempt is underway, an overdose or serious injury has occurred, or there is immediate danger, contact emergency services. If it is safe, stay with the person while help is arranged. Reduce access to dangerous items only if you can do so safely. Do not promise secrecy about an immediate safety risk.

You do not have to decide alone whether the situation is serious enough. Contact a crisis service or treating professional when you are concerned.

Your safety matters too. Threats, violence, sexual coercion or controlling behaviour warrant help regardless of anyone’s diagnosis. If you are unsafe, prioritise getting to safety and contacting emergency or specialist domestic-abuse support. A communication script cannot make an unsafe situation safe.

Get support that belongs to you

I dislike advice that gives a struggling relative a long list of responsibilities and then adds “look after yourself” as an afterthought. You may need practical support, someone to talk to, or time when you are not on call.

In Australia, Family Connections offers a free, 12-week programme for relatives and other loved ones, with BPD education, communication skills and group support. Check current enrolment and availability with the provider. You can also seek counselling or speak with your GP about the effect the situation is having on you.

For a broader perspective on listening and respecting a relative’s choices, URevolution’s article on supporting a family member with chronic illness includes voices from people receiving that support.

For today, choose something manageable. Perhaps it is asking your relative what helps when they feel overwhelmed. Perhaps it is making one clear agreement about phone calls. Perhaps you need to book your own appointment.

I would leave room for the next conversation to go better, without demanding that either of you solve the whole relationship tonight.