Does insistence on sameness increase with co‑occurring conditions in autism?

PostedDecember 9, 2025

UpdatedDecember 9, 2025

ByMy Patient Advice

Author: Beatrice Holloway, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Yes, co-occurring conditions and sameness in autism are closely connected, and in many cases, additional diagnoses can intensify the need for predictability and routine. Autistic individuals with anxiety, ADHD, OCD, or learning differences may show stronger or more frequent sameness behaviours. The interaction between co-occurring conditions and sameness in autism often complicates daily functioning, but it can also offer insight into individual support needs.

For instance, ADHD and autism sameness may combine to create a push-pull dynamic: the need for sameness is strong, but attention challenges make following routines more difficult. Similarly, OCD and autism sameness can overlap in repetitive actions or fixations but the motivation behind them differs. While sameness in autism is often about comfort and stability, OCD rituals may stem from intrusive thoughts. These nuanced differences matter, especially in assessment and therapy planning. In general, comorbidity and autism rigidity are increasingly studied because they influence everything from school adaptation to emotional health.

Signs of Heightened Sameness with Co-occurring Conditions

Here’s how intensified sameness may appear:

Repeated questioning

Seeking constant reassurance about what’s next.

Overcontrolled routines

Needing things done a specific way, beyond typical autism patterns.

Increased distress with change

Extreme emotional responses when routines are disrupted.

Spotting these patterns early allows for better-personalised care and intervention.

Visit providers like Autism Detect for personal consultations and support tailored to multi-condition presentations.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Insistence on Sameness.

Beatrice Holloway, MSc

Author

Beatrice Holloway is a clinical psychologist with a Master’s in Clinical Psychology and a BS in Applied Psychology. She specialises in CBT, psychological testing, and applied behaviour therapy, working with children with autism spectrum disorder (ASD), developmental delays, and learning disabilities, as well as adults with bipolar disorder, schizophrenia, anxiety, OCD, and substance use disorders. Holloway creates personalised treatment plans to support emotional regulation, social skills, and academic progress in children, and delivers evidence-based therapy to improve mental health and well-being across all ages.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.