Medically reviewed by Andrew Crawford, Registered Psychological Associate.
Last updated: May 12, 2026
Time to read: ~15 minutes
Borderline personality disorder (BPD) is a mental health condition that makes emotions feel bigger, relationships feel more fragile, and your sense of self feel harder to hold onto, often alongside an overwhelming fear of being abandoned.
The good news: BPD is treatable with services like Southern California Sunrise Recovery Center’s BPD residential program. This guide walks through what BPD is, the symptoms used to diagnose it, the 7 traits that often show up in daily life, what causes it, and the treatment options that work.
What is Borderline Personality Disorder (BPD)?
Borderline personality disorder (BPD) is a mental health condition marked by intense emotional swings, unstable relationships, an unsteady sense of self, and a deep fear of abandonment. It affects an estimated 1.4 to 2.7 percent of U.S. adults and typically emerges in adolescence or early adulthood. People living with BPD often describe their emotions as overwhelming, their relationships as turbulent, and their sense of identity as uncertain, which is why the condition is sometimes still referred to by its older name, Emotionally Unstable Personality Disorder (EUPD).
How is BPD Diagnosed?
BPD is diagnosed when a person meets at least five of nine specific criteria outlined in the DSM-5-TR, the clinical manual used by mental health professionals. These criteria range from impulsive behavior and chronic feelings of emptiness to stress-related paranoia and recurrent self-harm. Because several of these symptoms overlap with depression, PTSD, and bipolar disorder, BPD is frequently misdiagnosed—particularly in men.
Criteria for borderline personality disorder
- Fear of abandonment: Going to extreme lengths to avoid being left, even when the threat isn’t real.
- Unstable, intense relationships: Rapid swings between idealizing someone and devaluing them, often within hours.
- Identity disturbance: A shifting, uncertain sense of self, changing goals, values, or self-image frequently.
- Impulsive, self-damaging behavior: Reckless spending, unsafe sex, substance use, binge eating, or dangerous driving.
- Recurrent self-harm or suicidal behavior: Cutting, burning, suicidal threats, or attempts, often as a way to release emotional pain.
- Intense mood swings: Sharp emotional shifts that last a few hours to a few days, usually triggered by interpersonal events.
- Chronic feelings of emptiness: A persistent sense of being hollow, numb, or like something is missing.
- Intense, hard-to-control anger: Frequent outbursts, lasting bitterness, or fights, often followed by shame.
- Stress-related paranoia or dissociation: Brief episodes of suspicion or feeling detached from reality, usually under stress.
Do I have BPD?
Take our BPD self-test as a starting point if you are trying to determine whether yourself or a loved one has BPD. This should not be taken as healthcare advice, just a conversation starter for a doctor or psychological diagnostics professional.
If you are still uncertain, keepo reading. These 7 key BPD traits (with examples) might resonate with you or sound like someone you know:
Borderline Personality Disorder (BPD) Traits
Borderline Personality Disorder (BPD) has key traits used to diagnose the patient. At least 5 of the traits are needed for a diagnosis of BPD.
1. Fear of Abandonment
They will have an extreme reaction to the fear of abandonment, and it will cause a great deal of anxiety. This fear may cause them to
- Push people away. Reject them before they get rejected. Break up with them before they do you
- Verbal or physically abusive
- Make threats about self-harm or suicide
- Call or text a lot when loved ones are late
Simple things can trigger this fear of anxiety, panic, and isolation. They have very real fears.
2. Feelings of Emptiness
You may feel emptiness, like a hole you try to fill inside you. You may feel as though you’re fake and look for things to fill that void.
3. Impulsive Behavior
Those feelings of emptiness can lead to impulse control. Signs are overspending, substance abuse, sex with many different partners, and overeating.
4. Identity Confusion
People with Borderline Personality Disorder (BPD) are not sure who they are. May have problems with self-esteem. They look to others to see who they should be.
5. Unstable Emotions and Anger
BPD patients have severe mood swings. They can go from happy to sad and back again. They can become anxious quickly. Their emotion doesn’t always reflect the actual environment around them.
The anger or rage can come out of nowhere and is often illogical.
6. Paranoia and Dissociation
People living with BPD can suffer paranoia and dissociation when stressed. They have illogical mistrust of people and things around them.
They may even experience dissociation, feeling disconnected from one’s body or the world around them.
Memory issues can occur during this time. People may forget things or remember a different version of something that happened.
7. Self-harm and Suicidal Threats
Seventy-five percent of individuals living with Borderline Personality Disorder (BPD) have attempted suicide.
They may also engage in self-harm, such as cutting or burning themselves. The physical pain acts as a disturbance for the emotional pain.
People with BPD may have no intention of self-harm or suicide, but they may make their loved ones believe it. This is a way to get attention and control the situation.
Diagnosis and Treatment
Borderline Personality Disorder (BPD) affects both men and women equally. Women are diagnosed more than men. Men are often misdiagnosed with Post Traumatic Stress Disorder.
Diagnosis
To receive a diagnosis, a healthcare provider will examine the patient’s symptoms and medical history and perform an exam to rule out any physical illnesses.
If your physician suspects a BPD diagnosis, they may refer you to mental health services. You may see a psychiatrist and get an official diagnosis.
The Diagnostic and Statistical Manual of Mental Disorders helps diagnose your illness.
You will receive a diagnosis of Borderline Personality Disorder (BPD) if you meet at least 5 of the BPD traits.
Treatment
Several forms of treatment are in use to treat Borderline Personality Disorder (BPD).
- Psychotherapy or “Talk” therapy – Both group and individual have been shown to be helpful
- Dialectal Behavioral Therapy (DBT) – teaches people to cope with stress and be in the moment
- Mentalization-Based Therapy (MBT) -Teaches how to separate one’s thoughts and feelings. You’ll distinguish between your feelings and someone else’s
- Cognitive Behavioral Therapy (CBT) -teaches how to program your mind to think differently
- Medications – These are used to target symptoms. So, the medication varies depending on the patient.
Seek Treatment
Do you or a loved one have Borderline Personality Disorder (BPD) traits?
Please Contact a reputable mental health service today.
There are treatments available to help you take control again. If you have a feeling of suicide, please get in touch with the suicide prevention line. Or call 911 immediately.
Borderline Personality Disorder FAQ
Here are some questions people also ask about BPD meaning, traits, symptoms, diagnosis, and treatment.
What is borderline personality disorder in simple terms?
Borderline personality disorder (BPD) is a mental health condition that makes it hard to manage emotions, maintain stable relationships, and hold a steady sense of who you are. People with BPD often experience intense mood swings, a strong fear of abandonment, and impulsive behaviors. It’s a real, diagnosable condition, not a character flaw, and it’s treatable with the right care.
What are the main traits of someone with BPD?
The most recognizable BPD traits include a fear of abandonment, unstable relationships that swing between closeness and conflict, an unsteady sense of identity, impulsive or risky behavior, chronic feelings of emptiness, intense mood swings, and difficulty controlling anger. Many people with BPD also experience self-harm or stress-related paranoia. A formal diagnosis requires at least five of nine specific symptoms outlined in the DSM-5-TR.
What’s the difference between BPD symptoms and BPD traits?
The terms overlap, but there’s a useful distinction. Symptoms refers to the nine clinical criteria mental health professionals use to diagnose BPD. Traits tends to describe how those symptoms show up in everyday life, including the patterns in someone’s relationships, reactions, and self-image. A person can have BPD traits without meeting the full diagnostic threshold for the disorder.
How do I know if someone has BPD?
You can’t diagnose BPD on your own, but common signs include extreme reactions to perceived rejection, relationships that swing between intense closeness and sudden conflict, impulsive decisions, frequent identity shifts, and mood swings that seem out of proportion to the situation. If these patterns are persistent and significantly affecting someone’s life, a licensed mental health professional can do a proper evaluation.
Is BPD the same as bipolar disorder?
No. Both involve mood instability, but they’re different conditions. Bipolar disorder involves distinct episodes of mania or depression that last days, weeks, or months. BPD involves rapid emotional shifts, usually lasting hours to a couple of days, that are typically triggered by interpersonal events. BPD is often misdiagnosed as bipolar disorder, which is why a thorough clinical evaluation matters.
Can someone have BPD traits without having BPD?
Yes. Many people show one or two BPD-like traits, such as intense emotions, fear of rejection, or occasional impulsivity, without meeting the diagnostic criteria for the disorder. BPD is only diagnosed when at least five of the nine DSM-5-TR symptoms are present, persistent over time, and significantly disrupting a person’s relationships, work, or sense of self.
