Understanding Borderline Personality Disorder
National BPD Awareness Week | 1-7 October
Borderline Personality Disorder (BPD) is a complex mental health condition that can be misunderstood, both within the wider community and sometimes in clinical settings. Developing a more complete understanding of BPD means looking beyond the diagnosis itself and considering a person’s developmental history, experiences and the factors that may be contributing to their current presentation.
Understanding BPD
BPD can involve difficulties with emotional regulation, relationships, impulsivity and a strong sensitivity to experiences of rejection or abandonment. However, these experiences can overlap with other mental health and neurodevelopmental presentations, which can make assessment particularly complex.
This is especially relevant when considering the relationship between BPD, ADHD and childhood trauma.
BPD, ADHD and Trauma
Research increasingly highlights the complex relationship between BPD, ADHD and trauma across development, particularly for women.
Studies have found associations between childhood ADHD symptoms, complex childhood trauma and later BPD symptoms. Childhood ADHD, particularly difficulties with executive functioning and impulsivity, combined with experiences of adversity, has also been associated with increased vulnerability to BPD symptoms in young adulthood.
These presentations can be difficult to distinguish because emotional dysregulation, attention difficulties and behavioural challenges can occur in the context of ADHD, trauma and BPD.
This overlap appears particularly relevant for women, where neurodevelopmental differences such as ADHD or autism may have gone unrecognised earlier in life. When these differences are missed, understanding a person’s current presentation can become more complex.
Importantly, this does not mean that ADHD or trauma causes BPD. Rather, the research highlights how neurodevelopment, childhood experiences and mental health can interact across development.
Why Assessment Can Be Complex
Neurodevelopmental differences can influence how a child experiences school, relationships, emotional regulation and the world around them. Trauma and chronic adversity can then compound these difficulties and create additional symptoms.
At the same time, trauma can produce difficulties that look similar to ADHD or BPD. When a neurodevelopmental condition has been missed during childhood, this can make understanding a person’s current presentation even more complicated.
This is why it can be important to consider the whole developmental picture rather than focusing solely on the symptoms or diagnosis in front of us.
Moving Beyond the Label
The research supports a developmental, trauma-informed and neuroaffirming approach to understanding BPD. This means considering a person’s neurodevelopmental history, childhood experiences and current presentation together.
For women in particular, recognising the potential overlap between BPD, ADHD, autism and trauma may be important when neurodevelopmental differences have previously gone unrecognised.
A diagnosis can be an important part of understanding someone’s experiences, but it is also important to understand the person behind the diagnosis - their history, their environment and the factors that have shaped how they experience the world.
Sources
● Seabrook (2024) - research exploring the relationships between complex childhood trauma, ADHD and BPD.
● Davies (2025) - research examining the overlap between mental health, neurodevelopmental characteristics and trauma in childhood and adolescence.
● O’Grady & Hinshaw (2023) - longitudinal research examining childhood ADHD, adversity and later BPD symptoms in females.
● Gogne (2025) - research exploring the association between BPD and atypical neurodevelopment, including ADHD and autism, particularly in women.
