BPD and ADHD are two different conditions that can look alike: ADHD is a neurodevelopmental condition that starts in childhood, while borderline personality disorder (BPD) is mainly about intense emotions, relationships and sense of self. They can also occur in the same person, and only a qualified clinician can tell which applies.
This guide explains how the two differ, where they overlap, and what support exists in Australia. It sits within our wider guide to ADHD and co-occurring conditions.
BPD is a mental health condition that mostly shows up in how a person feels, relates to others and sees themselves.
ADHD is a neurodevelopmental condition that affects attention, activity and impulse control, with symptoms that begin in childhood.
The difference between ADHD and BPD is in the main area affected and, for ADHD, a history that goes back to childhood.
Both conditions can involve impulsivity, mood changes and relationship strain, so a clinician has to look at the whole history.
So, can BPD be mistaken for ADHD? Because the two can share features and can occur together, a careful assessment matters. “Borderline ADHD” is not one of the three ADHD presentations the guideline describes, so if you hear the phrase, ask the clinician what they mean by it.
TQN Care support workers help with personal care, community access, respite and help around the home across Sydney, Melbourne and surrounding areas (NSW & VIC). Tell us what you need and we will call you back.
Make a referral →ADHD in girls and women can be missed, which matters when BPD is also being considered.
Both conditions can affect friendships, family ties and partnerships.
Complex post-traumatic stress disorder (CPTSD), BPD and ADHD can involve some similar experiences, such as strong emotions and trouble concentrating, so a clinician needs to separate them.
Our guide to ADHD and trauma explains how trauma and ADHD can interact. A qualified clinician can help separate them.
A self-check cannot answer whether you have BPD or ADHD. Use the table below to plan your next step, then book a GP appointment.
Related reading: ADHD vs autism, bipolar vs ADHD, OCD and ADHD, BPD vs autism, ADHD and menopause and is BPD a disability.
TQN Care support workers help with personal care, community access, respite and help around the home across Sydney, Melbourne and surrounding areas (NSW & VIC). Tell us what you need and we will call you back.
Make a referral →If you or someone you care about is living with these conditions, practical support can make days easier. TQN Care provides NDIS support workers for personal care, community access and help around the home, and we never provide treatment or diagnosis. Read about TQN Care NDIS services, or make a referral and we will call you back to talk about what you need.
The two can share features such as impulsivity, mood changes and relationship difficulty, and they can occur together, so a careful assessment matters. For ADHD, a clinician looks for evidence of symptoms before age 12, lasting at least 6 months and causing impairment in at least two settings.
Yes. The Australian ADHD Guideline found adults with borderline personality disorder have a significantly higher risk of ADHD. Having both is possible, and a qualified clinician can assess each condition separately so that support matches what you actually need.
ADHD is a neurodevelopmental condition with symptoms starting in childhood, mainly affecting attention and activity. BPD mainly affects emotions, identity and relationships. Both can involve impulsivity, and only a qualified clinician can tell which applies to you.
People sometimes describe quiet BPD, where distress is turned inward, and inattentive ADHD, which is less visible. Neither term replaces a diagnosis. If you recognise yourself in these descriptions, talk to your GP about a proper assessment rather than relying on labels.