Borderline Personality Disorder – Diagnosis Across Different Classification Systems

One of the metaphors used to describe the experience of people with borderline personality disorder (BPD, borderline personality disorder) is to compare their emotional state to a situation where one has no skin, in which every external stimulus (even a mild one) generates intense pain. This lack of “protection” reflects a deficit in affect regulation mechanisms. As a result, events that are considered neutral or trivial by the general population can trigger crisis-like reactions in people with borderline personality disorder, which they perceive as a struggle for survival.

Borderline personality disorder is not a “difficult personality” or ill will. It is a specific, extremely reactive system in which relationships serve as an external regulator of an unstable sense of self. The greatest challenge here is the lack of emotional stability in the individual—the inability to maintain a consistent, positive image of oneself and others in the face of stress. As a result, intimacy becomes an arena of violent shifts: from a desire to merge completely with another person to a sudden sense of hostility and alienation as soon as the slightest hint of misunderstanding arises.

Behind the diagnostic criteria lies a living person and their suffering; however, standardization helps us avoid making mistakes, which is why it is so important. In this post, I present a checklist that will help in the accurate diagnosis of borderline personality disorder.

Borderline Personality Disorder According to the DSM-5 

To be diagnosed with BPD, a patient must meet at least 5 of the 9 of the following criteria:

1. Fear of abandonment: Panicked efforts to avoid real or imagined abandonment.
2. Unstable Relationships: Patterns of intense but fleeting bonds; oscillating between idealization and devaluation.
3. Identity Disorders: A markedly and persistently unstable self-image or sense of self.
4. Impulsivity: Engaging in risky behaviors in at least two areas (sex, spending, substance use, eating).
5. Self-harming behaviors: Recurrent suicidal gestures, threats, or behaviors; self-harm.
6. Emotional instability: Marked mood swings (e.g., intense anxiety, irritability, or sadness that typically lasts for several hours).
7. A feeling of emptiness: A chronic feeling of an inner “black hole” or a lack of meaning.
8. Inappropriate, intense anger: Difficulty controlling anger, frequent outbursts of anger, sarcasm, quarrelsomeness.
9. Paranoid/dissociative symptoms: Transient, stress-related beliefs of persecution or severe depersonalization.

Borderline Personality Disorder according to ICD-10 (still in use in Poland)

In ICD-10, borderline personality disorder is classified under code F60.3: Emotionally unstable personality. It is divided into two types:Impulsive type (F60.30) – At least 3 of the following characteristics must be present:

1. A tendency toward argumentative behavior and conflicts.
2. A tendency to act impulsively without considering the consequences.
3. A tendency to easily lose one's temper or become aggressive.
4. Difficulty sustaining activities that do not provide immediate satisfaction.
5. An unstable and unpredictable mood.

Borderline type (F60.31) – Criteria for the impulsive type are met + at least 2 of the following:

1. Uncertainty or confusion regarding one's self-image, personal goals, and preferences.
2. A tendency to become involved in intense and unstable relationships (emotional crises).
3. Determined efforts to avoid abandonment.
4. Repeated threats or acts of self-harm.
5. A feeling of inner emptiness.

Borderline Personality Disorder According to ICD-11

The latest ICD-11 classification is revolutionizing diagnosis by moving away from rigid categories in favor of a dimensional model. It describes personality disorders using two main dimensions:

1. Severity of the disorder (code 6D10): It is classified as mild, moderate, or severe, based on an assessment of problems in “self” functioning (identity, self-esteem) and in interpersonal functioning (the ability to form and maintain relationships).
2. Dominant personality traits or patterns (code 6D11): To describe the patient more precisely, it is possible to identify which pathological trait domains are dominant in him or her (e.g., negative affect, disinhibition). Within this dimension, to maintain diagnostic continuity, a special qualifier “borderline pattern” (code 6D11.5). 

We recognize this pattern when the following elements predominate:

• • Relational, identity-related, and affective instability.
  • High impulsivity.
  • Fear of abandonment as the main motivator for action.
  • Dissociative or paranoid episodes triggered by stress.
  • Frequent risky and self-destructive behaviors.

Summary

This compendium presents various approaches to the diagnosis of borderline personality disorder (BPD) across three key classification systems: the DSM-5, the ICD-10, and the ICD-11. Despite differences in the number and formulation of criteria (ranging from the rigid 9 criteria of the DSM-5, through the ICD-10’s distinction between the impulsive and borderline types, to the dimensional approach of ICD-11, which focuses on severity), the common denominator remains the central problem of BPD: a lack of proper affect regulation leading to instability in identity, relationships, and recurring crises. Diagnostic standardization is essential to avoid errors in the diagnostic process; however, its ultimate goal must always be to recognize and alleviate suffering.

Sources

[1] Mosiołek, A. (2013). Borderline Personality Disorder: How to Recognize It and How to Cope with It? *Psychiatria po Dyplomie*, 12, 21–25.

[2] Mendez-Miller, M., Naccarato, J., & Radico, J. A. (2022). Borderline Personality Disorder. *American Family Physician*, 105(2), 156–161.

[3] Leichsenring, F., Fonagy, P., Heim, N., Kernberg, O. F., Leweke, F., Luyten, P., Salzer, S., Spitzer, C., and Steinert, C. (2024). Borderline personality disorder: a comprehensive review of diagnosis and clinical presentation, etiology, treatment, and current controversies. World Psychiatry, 23(1), 4–25.

[4] Krzysztof-Świderska, A., & Małek, D. (2022). Borderline Personality Disorder in the ICD-11 and DSM-5: The Relational Nature of the Diagnostic Criteria. Psychiatry and Clinical Psychology, 22(3), 175–179.