Do ADHD Features Emerge After Autism Diagnosis? 

ADHD onset after autism diagnosis is a concern often raised by parents and clinicians, especially when behavioural changes are observed following an autism diagnosis. While autism diagnosis progression typically focuses on traits like social challenges, sensory sensitivities, and communication difficulties, ADHD development can sometimes emerge or become more apparent over time. This overlap can lead to a co-occurring diagnosis of AuDHD, where both autism and ADHD symptoms are present. 

For some individuals, traits of ADHD such as impulsivity, inattention, and hyperactivity may not be immediately noticeable in early childhood but become more prominent as they age. As the child grows and faces more complex social and academic demands, the challenges associated with ADHD may become more apparent. This could lead to the recognition of ADHD features after an initial autism diagnosis, particularly when the social or cognitive demands increase. 

How ADHD Features Emerge After Autism Diagnosis 

ADHD features may emerge after an autism diagnosis as attention, impulsivity, and hyperactivity difficulties become more noticeable over time. 

Increasing Social and Academic Demands 

As children with autism progress through school, they may encounter situations that require more complex cognitive skills, such as organisation, sustained attention, and task switching. These situations can highlight ADHD development, especially in those who have difficulty with focus and impulse control, which may not have been as evident during early childhood when their environment was less demanding. 

Overlap of Autism and ADHD Traits  

In some cases, the ADHD onset after autism diagnosis might not be immediately recognised because many symptoms of ADHD overlap with autism traits. For example, difficulties with attention and executive function can be mistakenly attributed to the social and sensory challenges of autism. Over time, however, these ADHD features may become clearer as the individual struggles with regulating their attention, managing tasks, or controlling impulsivity. 

Recognising ADHD development after an autism diagnosis progression is crucial for providing appropriate support and intervention. A dual diagnosis of AuDHD can lead to a more comprehensive treatment approach, addressing both autism and ADHD symptoms. Providers like ADHD Certify can offer personalised guidance to help manage the complexities of these co-occurring conditions.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Autism Spectrum Disorder.