Autism rarely travels alone.

ADHD. PDA. Alexithymia. Most of us have at least one co-occurring condition, and it often goes undiagnosed. Understanding the overlap is one of the most clarifying things you can do.

ADHD & autism overlap heavily

Up to 70% of us also meet criteria for ADHD. The two conditions share mechanisms, interact in complex ways, and are frequently diagnosed separately, or one gets diagnosed instead of the other.

Many conditions mask as each other

PDA, alexithymia, demand avoidance. Several experiences that look like personality traits or mood disorders are often better explained as features of a neurodivergent nervous system.

A more complete picture helps

Understanding the full landscape of your neurology finally gives you language for experiences that never had any. The point is accuracy, a name for what you have been living with all along.

The conditions that often come with autism

The image of autism as a standalone, clearly bounded condition doesn't match how most of us actually live it. ADHD co-occurs at high rates. PDA describes an autistic profile that behaves very differently under demand. Alexithymia, difficulty identifying your own emotions, affects around half of us. These all belong to the same picture, and they make more sense when you look at them together.

This hub is for you if you are trying to understand the full shape of your neurology and want accurate language for experiences that never fit the standard descriptions. Realising that what looks like ADHD, or emotional dysregulation, might be part of your autistic neurology can change which support actually helps.

ADHD & autism

5 articles
Start hereStart here What it's like to be autistic and ADHD The everyday reality of carrying both wirings at once: the contradictions, the exhaustion, and why the combination is its own distinct experience. Read Compared ADHD burnout vs autistic burnout Two kinds of burnout that can look similar and interact closely. What makes each distinct, and what happens when you have both. Read AuDHD AuDHD in women The push and pull of needing routine and craving escape at once: why the autism and ADHD contradiction hits women so hard, and how to live with both. Read Compared Stimming in ADHD vs autism How stimming shows up differently across the two conditions, and what that tells us about why we do it. Read Relationships Loving someone with autism and ADHD What relationships look like when one or both partners are navigating the overlap of autism and ADHD. Read

Other co-occurring conditions

9 articles
Explained PDA in autistic adults Pathological demand avoidance, also called pervasive drive for autonomy. What it is, how it presents, and why it's often missed. Read Common, unnamed What is alexithymia? The difficulty naming your own emotions, why it affects so many of us, and what it means for your life. Read The body Autism and pain Why the signal often does not reach you until it is already severe, and how to be taken seriously when you cannot rate it out of ten. Read Less discussed Selective mutism in autistic adults Losing speech under high stress. It is more common than acknowledged, and often misread as stubbornness or withdrawal. Read Co-occurring Autism & Anxiety Your anxiety runs on different mechanisms, intolerance of uncertainty and sensory load, which is why standard advice keeps missing. The approaches that actually fit. Read Often missed Autism & Eating Disorders For a lot of us, eating became a way to regulate and had little to do with body image. Why the link runs so deep, and what actually helps. Read Often undiagnosed ARFID in Adults When restricted eating tips past sensory selectivity into something that harms your health. The three drivers, the autism link, and support that actually fits. Read OCD Autism vs OCD How to tell autistic routines from OCD compulsions, and when it is both. Read Intellectual disability Autism and intellectual disability Understanding the overlap and the difference, without conflating the two. Read

Getting answers

3 articles
The criteria DSM-5 autism criteria explained What the formal diagnostic criteria for autism actually say, in plain language, for when you are trying to understand your own diagnosis. Read Practical Autism assessments for adults What to expect from an adult autism assessment: the process, the tools used, and how to prepare. Read After diagnosis Autism treatment for adults What support options actually exist for you as an adult, and how to navigate a system often designed for children. Read

Your questions answered

Can you be autistic and have ADHD at the same time?
Yes, and it's common. Research suggests up to 70% of us also meet criteria for ADHD. The two conditions share genetic factors, affect overlapping brain systems, and interact in ways that can amplify the difficulties of each. For a long time, diagnostic frameworks didn't allow a dual diagnosis, so a lot of us were diagnosed with one and missed for the other.
What is PDA in autism?
PDA stands for pathological demand avoidance, though many of us prefer pervasive drive for autonomy. It describes an autistic profile characterised by extreme resistance to everyday demands, driven by high anxiety, a strong need for control, and a nervous system that experiences external expectation as threat. Underneath sits a different relationship with autonomy, one your nervous system defends hard. Calling it wilfulness or defiance misreads it.
What is alexithymia?
Alexithymia is difficulty identifying, labelling, and describing your own emotional states. It affects approximately 50% of us. You can feel things intensely and still find that the connection between having a feeling and being able to name it is less direct. This has significant implications for your mental health, your relationships, and how therapy works for you.
What's the difference between autistic burnout and ADHD burnout?
There's significant overlap but meaningful differences. ADHD burnout tends to be linked to sustained effort at tasks that require executive function the ADHD brain finds difficult. Autistic burnout is more specifically tied to masking, sensory overload, and the gap between autistic need and neurotypical expectation. A lot of us experience both at once, which can make recovery more complex.
What is rejection sensitive dysphoria?
Rejection sensitive dysphoria (RSD) is the intense, often overwhelming emotional response to perceived or actual rejection or criticism. Widely discussed in ADHD contexts, it's relevant for a lot of us too. The response can look disproportionate by neurotypical standards, and it is a genuine neurological pattern. It says nothing about your character or your emotional maturity.
Cover of The Unmasking Years

If the full picture has always felt out of reach

The Unmasking Years

Written for you if you were diagnosed late and are making sense of a complex neurology. The more you understand how your brain works, the more you can actually work with it.

Read The Unmasking Years

Related topics

Autistic CommunicationSituational mutism, shutdown and the channels that cost the most, gathered in one place. Mental HealthDepression, anxiety, overwhelm. The mental health landscape of autistic life, and what actually helps. Autistic BurnoutThe crash that often follows years of masking and sustained demand. What it is and how to recover. Late DiagnosisFinding out you're autistic as an adult, and how a late diagnosis often reframes everything that came before it.