What is Sensory Processing Difference?
Most autistic children process sensory information differently from neurotypical children. This is not stubbornness or attention-seeking — it is a neurological difference in how the brain receives, organizes, and responds to sensory input from the environment.
Sensory processing differences affect 90–95% of autistic individuals to some degree. They can be the most disabling part of daily life, yet are often dismissed by families and even some professionals.
There are two main patterns:
Hypersensitivity (over-responsive): The brain amplifies sensory signals. A sound that is mildly annoying to you feels physically painful. A clothing tag feels like sandpaper. This leads to avoidance behaviors and distress.
Hyposensitivity (under-responsive): The brain under-registers signals. The child seems not to feel pain, seeks intense sensory input (spinning, crashing, mouthing objects), doesn't notice their name being called.
Many children are a mix of both — hypersensitive in some areas, hyposensitive in others.
The 8 Senses (Including the Hidden Ones)
Most people know 5 senses. Sensory processing includes 3 more:
- Sight, Sound, Touch, Taste, Smell — the familiar five
- Vestibular — balance and movement; located in the inner ear
- Proprioception — body position and pressure; felt through muscles and joints
- Interoception — internal body signals (hunger, thirst, needing toilet, heartbeat)
Autistic children often have significant differences in vestibular, proprioceptive, and interoceptive processing — which is why they crave spinning, deep pressure hugs, or can't tell when they're hungry.
Common Sensory Challenges in Indian Contexts
Sounds: Loud traffic, wedding music, pressure cooker whistle, Diwali crackers, classroom noise, school bells, fans, AC units. These can trigger genuine distress or meltdowns.
Touch: Cannot wear certain fabric textures, hates having hair washed, refuses to walk barefoot on grass, distressed by unexpected touch. Dupatta, salwar drawstrings, footwear may all be problematic.
Food: Limits diet to 5–10 foods based on texture, smell, or appearance rather than taste. Dal that is too thin, roti that has spots, vegetables that touch other food. This is called Avoidant/Restrictive Food Intake Disorder (ARFID) when severe.
Smell: Incense, agarbatti, strong spices cooking, perfume, public toilets — can be overwhelmingly distressing.
Crowds and temples: Festivals, markets, relatives' gatherings, temples with bells and crowds are often sensory nightmares.
Strategies for Sensory Hypersensitivity
Sound: Noise-cancelling headphones or ear defenders for overwhelming environments. Give warning before loud sounds. Let child leave crowded situations.
Touch: Let the child choose their own clothing. Cut out tags. Use seam-free socks. Allow weighted blanket at night. Give warning before touching ("I'm going to comb your hair now").
Food: Never force new foods. Use food chaining (gradually introduce foods similar to accepted ones). Separate foods on plate. Allow repetitive menus — nutrition matters more than variety initially.
Smell: Unscented laundry products. Sit away from kitchen while cooking. Fragrance-free home where possible.
Strategies for Sensory Hyposensitivity (Seeking Behavior)
Children who seek sensory input need appropriate channels for it:
- Crash pads and trampolines for proprioceptive input
- Swings for vestibular input
- Chewable jewellery (chewelry) for oral seekers
- Heavy work — carrying shopping bags, pushing a trolley, climbing
Sensory Diets
An Occupational Therapist (OT) can design a "sensory diet" — a personalized daily schedule of sensory activities to keep the child's nervous system regulated throughout the day. This is one of the most effective interventions for reducing meltdowns and increasing attention.