Borderline personality disorder (BPD) is a serious mental health condition affecting about 1 in 100 people in the United States. It is characterized by pervasive patterns of instability in mood, self-image, and interpersonal relationships, often leading to impulsive behaviors and intense emotional experiences1 . Individuals with BPD frequently struggle with fear of abandonment and chronic feelings of emptiness, which complicate their social and occupational functioning2 . Understanding the signs and symptoms of BPD is crucial for early diagnosis and effective treatment.
Avoidant Behaviors
People with borderline personality disorder often exhibit avoidant behaviors driven by intense fears and emotional instability. These behaviors may include withdrawing from social situations or avoiding intimacy to protect themselves from perceived rejection or abandonment. Although the ICD-11 dimensional model highlights impaired self-direction as a core feature of personality disorders, specific data on avoidance behaviors in BPD are limited3 . The DSM-5 identifies identity disturbance as a diagnostic criterion, reflecting unstable self-image and shifting goals, which can contribute to avoidant tendencies4 .
Avoidance in BPD may serve as a coping mechanism to manage overwhelming emotions and interpersonal stress. However, it can exacerbate feelings of isolation and perpetuate unstable relationships.
Unstable Relationships
Instability in interpersonal relationships is a hallmark of borderline personality disorder. Individuals with BPD often experience intense and unstable relationships characterized by rapid shifts between idealization and devaluation of others4 . This pattern leads to chaotic and conflict-ridden interactions that can be emotionally exhausting for both the individual and those around them.
The DSM-5 lists unstable and intense interpersonal relationships as a diagnostic criterion for BPD4 . These relationships are often marked by frequent crises, misunderstandings, and a push-pull dynamic where the person may simultaneously seek closeness and distance.
“People with borderline personality disorder are characterized by their unstable relationships, and when they play this game, they tend to break,” says Read Montague, highlighting the destructive cycle common in BPD relationships5 .”
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Fear of Abandonment
A constant and overwhelming fear of abandonment is one of the core symptoms of borderline personality disorder. Individuals with BPD may go to great lengths to avoid real or imagined separation or rejection, often engaging in frantic efforts to prevent abandonment4 . This fear can manifest as clinginess, jealousy, or impulsive actions aimed at maintaining relationships.
This symptom significantly contributes to the instability of relationships and emotional distress experienced by those with BPD. The fear of abandonment can trigger intense anxiety, mood swings, and impulsive behaviors, further complicating interpersonal dynamics1 .
Depressive Episodes
Borderline personality disorder is significantly associated with depressive disorders, although it is distinct from chronic depression6 . People with BPD often experience chronic feelings of emptiness, which is a diagnostic criterion in the DSM-54 . These feelings can contribute to depressive episodes characterized by sadness, hopelessness, and low self-worth.
While BPD shares some symptoms with mood disorders, its mood changes are typically more rapid and reactive, often triggered by interpersonal stressors rather than sustained depressive episodes6 . This distinction is important for accurate diagnosis and treatment.
Rapid Mood Swings
Affective instability, or rapid mood swings, is a core feature of borderline personality disorder. Individuals with BPD experience marked reactivity of mood, with intense episodes of dysphoria, anxiety, or irritability that usually last a few hours and rarely more than a few days4 . These mood shifts are typically reactive to environmental or interpersonal stressors.
Unlike bipolar disorder, where mood episodes are sustained, BPD mood changes are rapid and often unpredictable6 . This instability contributes to the emotional turmoil and impulsive behaviors seen in BPD.
Impulsive Actions
Impulsivity is a defining characteristic of borderline personality disorder and is included as a diagnostic criterion in the DSM-54 . Individuals with BPD may engage in impulsive behaviors in at least two areas that are potentially self-damaging, such as reckless spending, unsafe sex, substance abuse, binge eating, or reckless driving4 .
These impulsive actions often serve as maladaptive coping mechanisms to manage overwhelming emotions or fears of abandonment. Additionally, recurrent suicidal behavior, gestures, threats, or self-mutilating behavior are common and represent serious risks associated with BPD4 .
Severe Anxiety
Severe anxiety is frequently experienced by individuals with borderline personality disorder, although specific prevalence data on anxiety symptoms in BPD are limited6 . BPD is associated with comorbid mood and anxiety disorders, which can exacerbate emotional instability and impulsivity.
Transient, stress-related paranoid ideation or severe dissociative symptoms may also occur during periods of intense stress, further complicating the clinical picture4 . These symptoms can impair functioning and increase the risk of self-harm or suicidal behavior.
Self-Esteem Instability
Borderline personality disorder involves significant instability in self-esteem and identity. The DSM-5 identifies identity disturbance, including markedly and persistently unstable self-image or sense of self, as a diagnostic criterion4 . Individuals with BPD may experience rapid changes in goals, values, and self-perception, contributing to confusion and distress.
Feelings of emptiness and worthlessness are common and can lead to difficulties in maintaining consistent life goals or aspirations. This instability often fuels the emotional dysregulation and impulsivity characteristic of BPD1 .
Suicidal Thoughts
Suicidal ideation and behaviors are serious concerns in borderline personality disorder. The lifetime risk of suicide in individuals with BPD ranges from 3% to 10% 6. Recurrent suicidal behavior, gestures, or threats, as well as self-mutilating behavior, are diagnostic criteria for BPD4 .
Impulsivity is a significant risk factor for suicidal behavior in BPD, often triggered by interpersonal stress or feelings of abandonment6 . Early identification and intervention are critical to reducing suicide risk in this population.
Empathy Difficulties
Impairments in interpersonal functioning, including difficulties with empathy and intimacy, are part of the ICD-11 dimensional model for personality disorders, which includes BPD3 . However, specific data on empathy deficits in BPD are limited.
Relationship instability in BPD may partly stem from challenges in empathizing with others or understanding the impact of one's behavior on relationships. These difficulties contribute to the cycle of intense and unstable interpersonal interactions6 4.
Intense Anger Episodes
Inappropriate, intense anger or difficulty controlling anger is a common symptom of borderline personality disorder and is listed as a diagnostic criterion in the DSM-54 . Individuals with BPD may frequently display temper outbursts, constant anger, or recurrent physical fights.
This anger is often disproportionate to the triggering event and can lead to significant interpersonal conflict and distress. Managing anger is a key focus in the psychotherapeutic treatment of BPD1 .
BPD Symptoms in Women vs Men
There is no direct evidence from available sources that describes sex differences in the presentation of BPD symptoms. The DSM-5 and ICD-11 diagnostic criteria do not differentiate BPD symptoms by sex6 4. Although BPD is diagnosed more frequently in women, research suggests that men may be underdiagnosed or misdiagnosed with other conditions such as mood disorders1 .
Is BPD Contagious?
Borderline personality disorder is not contagious. It is a complex mental health condition influenced by genetic, environmental, and social factors6 . There is no evidence supporting the transmission of BPD through contact or social interaction.
When to Seek Medical Help
Seeking medical help is important when symptoms of borderline personality disorder cause significant distress or impairment. Early diagnosis and treatment can improve long-term outcomes1 . Individuals should consult a healthcare provider if they experience:
- Intense fear of abandonment or rejection4
- Unstable and chaotic relationships4
- Impulsive and risky behaviors4
- Suicidal thoughts or self-harming behaviors4
- Severe mood swings or emotional instability4
The interaction between genetic factors and adverse childhood experiences plays a central role in the development of BPD6 . Treatment typically involves psychotherapy, which is the mainstay for managing symptoms and improving functioning6 .
Key Takeaways
- Borderline personality disorder is characterized by instability in mood, self-image, and interpersonal relationships, leading to significant functional impairment4 2.
- Core symptoms include fear of abandonment, impulsivity, intense anger, chronic feelings of emptiness, and recurrent suicidal behaviors4 6.
- Rapid mood swings in BPD are typically reactive and short-lived, differing from mood episodes in bipolar disorder4 6.
- Psychotherapy is the first-line treatment, with medication used primarily to address specific symptoms or comorbid conditions6 1.
- Early recognition and intervention can improve prognosis and reduce risks such as suicide6 5.
