What Are Common Signs of Sensory Processing Differences in Toddlers with Autism?

PostedDecember 15, 2025

UpdatedDecember 15, 2025

ByMy Patient Advice

Author: Hannah Smith, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Sensory differences in toddlers with autism are often some of the earliest indicators of developmental concerns. Many toddlers with autism experience sensory input in ways that are different from typical development, which can impact their developmental milestones and behaviour. Recognising these early signs of sensory processing differences is crucial for early intervention and support.

Sensory processing issues in toddlers with autism can include heightened or reduced sensitivity to sounds, textures, lights, or even certain tastes. These differences can cause discomfort, anxiety, or distress, and may be expressed through behaviours such as avoiding certain activities, seeking specific sensory experiences, or showing extreme responses to everyday stimuli.

Common Signs of Sensory Processing Differences in Toddlers

Here are some common sensory differences in toddlers with autism:

Overreacting to sensory stimuli

Toddlers may have strong reactions to everyday sensory experiences, such as loud noises, bright lights, or certain textures. They might cry, cover their ears, or refuse to interact with specific objects or environments because they are overwhelmed by sensory input.

Underreacting to sensory input

Conversely, some toddlers may seem less responsive to sensory stimuli. For example, they may not react to pain, may not seem bothered by loud noises, or may seek out intense sensory experiences like spinning, jumping, or touching objects repetitively.

Avoiding or seeking sensory experiences

Toddlers with autism may develop preferences for certain textures, such as avoiding rough fabrics or seeking out specific soft materials, or they may avoid certain foods or experiences based on sensory discomfort.

Identifying sensory differences in toddlers with autism early on can lead to earlier support, helping children meet developmental milestones and thrive in everyday environments.

Visit providers like Autism Detect for guidance on recognising early signs and supporting sensory needs in toddlers.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Sensory Processing Differences.

Hannah Smith, MSc

Author

Hannah Smith is a clinical psychologist with a Master’s in Clinical Psychology and over three years of experience in behaviour therapy, special education, and inclusive practices. She specialises in Applied Behavior Analysis (ABA), Cognitive Behavioural Therapy (CBT), and inclusive education strategies. Hannah has worked extensively with children and adults with Autism Spectrum Disorder (ASD), ADHD, Down syndrome, and intellectual disabilities, delivering evidence-based interventions to support development, mental health, and 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 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.