Borderline Personality Disorder (BPD) is a psychiatric disorder that affects thinking, feeling, and behavior, resulting in extreme emotional fluctuations, unstable relationships, and difficulty regulating identity and emotions. Symptoms usually begin in the late teens or early twenties.
It affects about 1.4% of the general population and is diagnosed in about 10% of psychiatric outpatients and 20% of psychiatric inpatients. 75% of diagnosed cases are female, although recent studies suggest that there may be undiagnosed cases among males.
What is borderline personality disorder?
Borderline personality disorder is a mental health condition that affects the way people feel about themselves and others, making it difficult for them to cope in everyday life. The disorder is characterized by a pattern of unstable and violent relationships as well as impulsivity and an unhealthy view of self. People with BPD have an intense fear of abandonment or being alone, and although they want to have loving and lasting relationships, this fear of abandonment often leads to mood swings and anger, as well as impulsive and self-harming behaviors that may drive others away.
Borderline personality disorder usually begins in early adulthood and is most severe during this period. Mood swings, anger, and impulsivity improve with age, but underlying issues of self-image, fear of abandonment, and relationship issues persist.
What is the difference between borderline personality disorder and bipolar disorder?
While bipolar disorder is also characterized by wide fluctuations in mood and behavior, it differs from borderline personality disorder (BPD). In BPD, mood and behavior change rapidly in response to significant stress, especially when interacting with other people. In bipolar disorder, moods are more persistent and less reactive. People with bipolar disorder also experience significant fluctuations in energy and activity, unlike those with BPD.
Symptoms of borderline personality disorder: Clinical signs and psychological effects
People with BPD may experience extreme mood swings and a sense of uncertainty about how they see themselves, and their feelings towards others may change rapidly, moving from extreme closeness to extreme alienation. These fluctuating emotions can lead to unstable relationships and emotional pain, and can shift from anger and hatred to extreme fear of abandonment and reactions to it, and identity disorder from fluctuations in changing goals and values to an unclear or unstable self-image and aggressive, impulsive behaviors. Not everyone with BPD exhibits all of these symptoms, and the severity, frequency, and duration of symptoms depend on the individual and their condition.

Emotional fluctuations: How does it affect interpersonal relationships?
For someone with BPD, relationships can be an emotional rollercoaster ride that sometimes begins with intense passion and attachment, then quickly turns into fear or even anger. A delayed response to a message can feel like abandonment, evoking deep feelings of rejection, not because they are dramatic, but because the sufferer experiences these emotions with real intensity. As a result, communication with others can become exhausting, as they experience conflicting emotions very quickly. It often starts with a strong attachment and fear of abandonment that makes the person very sensitive to any sign of rejection, even if it is as simple as a delayed response, and this fear leads to strong emotional reactions such as anger or sudden withdrawal.
Impulsive behaviors: From suicide to risky behaviors
Impulsive behaviors are a core feature of Borderline Personality Disorder (BPD) and include quick and thoughtless actions that are often driven by intense and temporary emotions such as anger, fear, and a sense of emptiness. These behaviors can be very harmful to the individual or to others, and include a wide range of behaviors such as repeated attempts at suicide or self-harm as a means of escaping emotional pain or begging for attention in moments of fear of abandonment, as well as other manifestations such as substance abuse, reckless driving, compulsive eating or excessive spending, often as a quick reaction to painful feelings without thinking about the consequences.
This impulsivity is not a search for pleasure, but rather an internal cry to survive an unrelenting emotional storm. These behaviors, while seemingly temporary, can have profound effects on both the person and their loved ones, and with support and therapy, affected individuals can learn to deal with their impulsivity in a safer and more stable way.
Causes of borderline personality disorder: Genetic, environmental, and psychological factors
Researchers are not sure exactly what causes BPD. Still, studies suggest that genetic, environmental, and social factors may increase the risk. There is no single direct cause, but rather a combination of genetic predispositions and life experiences that shape thinking and behavior.
Biological genetic factors include genetic predisposition. Studies suggest that BPD may be more common among people who have first-degree relatives with BPD. Research shows that people with BPD may have structural and functional changes in the brain, especially in areas responsible for impulse control and emotion regulation.
Many people with BPD report experiencing traumatic life events such as abuse or harsh conditions during childhood. Some may have grown up in unstable environments or in unsupportive or conflict-ridden relationships. Others may have grown up in unstable environments or in unsupportive or conflict-ridden relationships, and while these factors may increase the risk of developing the disorder, it doesn’t necessarily mean a person will develop it. It is also possible for people without these factors to develop the disorder at some point in their lives.
How is borderline personality disorder diagnosed?
Personality continues to develop as a child or adolescent grows, which is why BPD is not diagnosed until after the age of 18. The disorder may be diagnosed before 18 if the symptoms are significant and persistent for at least a year, and the patient seeks help often for anxiety or depression. A psychiatrist or psychologist makes the diagnosis, and they do this by conducting a thorough interview and having conversations about symptoms, asking about medical, family, and work history, impulse control, and often working with the person’s family and friends to gather information about the patient’s behaviors and history.

Borderline personality disorder treatment methods: Psychotherapy and medication
Borderline personality disorder has historically been seen as a difficult disorder to treat. However, modern evidence-based treatments have enabled many people with BPD to experience less severe and frequent symptoms, improved functioning, and a better quality of life. Borderline personality disorder is mainly treated through psychotherapy, and medications may be added to the treatment plan. Therapy can help the patient learn skills to help them live with and cope with their condition, and any other psychiatric disorders that may coexist with BPD, such as depression, should also be addressed.
Many factors affect how long it takes for symptoms to begin to improve after starting treatment, so people with BPD and their loved ones must be patient and supportive during treatment.
Dialectical behavioral therapy (DBT) as the main option
Dialectical Behavior Therapy (DBT) is the treatment of choice for clinicians and is excellent for the treatment of BPD. It was developed specifically for BPD by Dr. Marsha Linehan in the 1990s. This therapy directly targets the underlying symptoms, addressing impulsivity, mood swings, self-harm, and fear of abandonment. For example, in a skills session, the patient may learn how to calm themselves when tensions rise instead of resorting to self-harm, and learn practical skills that can be used in daily life. Its components include individual sessions to address individual behaviors, mindfulness skills training, distress tolerance, emotion regulation, and relationship effectiveness, as well as intersession support and therapeutic team meetings aimed at supporting therapists and maintaining treatment effectiveness.
The goals of treatment are to reduce destructive behaviors such as suicide, improve interpersonal relationships, and increase self-awareness. Studies have shown significant reductions in suicide attempts and anger after several months of DBT, and many patients report an improved sense of emotional stability and the ability to communicate.
The role of medications in managing symptoms
Due to the unclear benefits of prescription medications for BPD, medications are not usually used as a primary method of treating the disorder. However, in some cases, a psychiatrist may recommend medications to treat specific symptoms or comorbid psychiatric disorders such as mood swings. Medications used to treat these conditions include antidepressants, antipsychotics, or mood stabilizers, although medications can sometimes cause side effects in some people.
How to support someone with borderline personality disorder: Tips for family and friends
Supporting someone with Borderline Personality Disorder (BPD) requires deep understanding. Loved ones can help the person take responsibility for their actions and encourage them to adopt healthy behaviors and adhere to therapeutic strategies. Support can be provided by taking the time to understand and learn about this disease, to feel what the patient is feeling, whether family or friends, while providing emotional support and patience for the patient’s issues and suffering, as change can be difficult and scary for people with BPD and this is normal to happen. Patients receiving treatment should be encouraged to ask about family therapy and seek advice from specialized therapists.

The importance of a supportive environment in treatment and recovery
A supportive environment plays an important role in the treatment of Borderline Personality Disorder (BPD) as the sufferer needs a safe and stable environment that helps them feel accepted despite their emotional ups and downs. People with BPD can feel isolated and misunderstood. Having a supportive network provides a safe space to express feelings, share experiences, and receive empathy and appreciation, and providing an understanding and safe environment by family and friends greatly helps reduce symptoms and encourages the patient to continue with treatment. The treatment journey can be long and difficult, so a support system provides encouragement and motivation, helping individuals stick to their treatment plans.
Borderline personality disorder is a psychiatric disorder characterized by extreme emotional swings, impulsive behaviors, and relationship difficulties. It differs from bipolar disorder in that the latter is associated with episodes of depression and mania, while borderline personality disorder is characterized by constant emotional fluctuations. Diagnosis requires examination of psychological and behavioral symptoms, and treatment is through psychotherapy such as Dialectical Behavior Therapy (DBT), along with medication to alleviate symptoms. Family and social support are very important for recovery, as they promote emotional stability and encourage adherence to treatment. By integrating these factors, individuals with borderline personality disorder can improve their lives and build more stable relationships.
Sources:
- National Institute of Mental Health. (n.d.). Borderline personality disorder. U.S. Department of Health and Human Service
- National Health Service (NHS). (2023, November 22). Borderline personality disorder – Overview
- Office on Women’s Health. (n.d.). Borderline Personality Disorder. U.S. Department of Health & Human Services