Sensory sensitivity in autism in adults

Written and professionally reviewed by Felix Enghoff Klich, authorised psychologist
Last updated: October 2026

The lights in the supermarket hum. Two colleagues are on the phone at the same time. A clothing label scratches your neck, and someone has sprayed perfume further down the corridor. For most people, these things fade into the background. For many adults with autism, they do not. Every impression demands attention, and after an ordinary day there may be very little energy left.

Unusual reactions to sensory input are part of the diagnostic criteria for autism, and research suggests that the vast majority of autistic people experience them. Even so, they are often overlooked, especially in adults who have learned to grit their teeth. In this article you can read what sensory sensitivity is, how it can feel, and what helps.

What is sensory sensitivity?

Sensory sensitivity means that the brain reacts more strongly to sensory input than in most people. Sounds can seem louder, light sharper and touch more unpleasant. It is not about being delicate or fussy. The impressions are actually experienced more intensely and are harder to filter out.

Oversensitivity is only one side of it. Professionals speak of differences in sensory processing, which can show up in three ways:

• Over-responsiveness: Input feels too intense, and you avoid it.
• Under-responsiveness: Input is registered weakly, e.g. pain, cold or hunger.
• Sensory seeking: You seek out strong input, e.g. pressure, movement, loud music or strong flavours.

Many people have a mix. You can be oversensitive to sound and at the same time seek deep pressure, and reactions can vary from day to day.

More than five senses

When we talk about the senses, most people think of sight, hearing, smell, taste and touch. But the body also has senses that tell us about balance, movement and our inner state. All of them can be affected:

• Hearing: background noise, chewing sounds, several conversations at once, sudden noises
• Sight: fluorescent lights, screens, bright sunlight, cluttered or busy surroundings
• Touch: clothing labels, seams, certain fabrics, light or unexpected touch
• Smell: perfume, cleaning products, food smells
• Taste and texture: mixed textures, certain foods, strong flavours
• Balance (vestibular sense): discomfort with movement, e.g. on buses and in lifts, or a need to rock and sway
• Body awareness (proprioception): a need for heavy pressure or difficulty sensing where your body is in space
• Inner signals (interoception): difficulty noticing hunger, thirst, tiredness, pain or when you need the toilet

The last one in particular is often overlooked. Many only notice that they are hungry or exhausted when it has become very hard to function.

Why does the brain react differently?

The brain constantly receives far more input than we can deal with. Normally it automatically filters out what is unimportant and gets used to sounds and sensations that repeat. Research suggests that this filtering and habituation works differently in autism. Impressions keep demanding attention to a greater degree, even after a long time.

This explains why a humming fridge can become more and more annoying instead of fading into the background, and why busy surroundings can take so much energy. The same detailed perception can also be a strength, e.g. as an eye for details, patterns, sound or colour.

When it becomes too much: overload

When sensory input piles up, the nervous system can become overloaded. This can show in different ways:

• irritability, restlessness or a strong need to get away
• your thoughts freeze, and it becomes hard to speak or find words
• headache, nausea or physical discomfort
• meltdown, where the reaction is directed outwards, e.g. as crying or anger
• shutdown, where you withdraw into yourself and can hardly respond

Neither a meltdown nor a shutdown is a choice. It is the nervous system's way of reacting when the limit has been reached. What helps most is getting away from the input, finding calm and not being given demands or questions until you have settled.

The hidden cost: exhaustion and burnout

Many adults have learned to endure sensory input without showing it, at work, at school or in social settings. It may look as if everything is fine, but it costs energy, and the price often comes afterwards as exhaustion, a need to be alone or headaches.

When sensory strain and hiding your reactions go on for a long time, it can contribute to stress, anxiety and what is called autistic burnout: a long-lasting state of exhaustion and reduced capacity. Read more about masking in autism.

Autism, ADHD or something else?

Sensory sensitivity alone is not enough for an autism diagnosis. Similar reactions can be seen in several other conditions, and it is important to look at the overall picture:

• ADHD: Many people with ADHD are also sensitive to noise and distractions, often because it is hard to stay focused. Many have both ADHD and autism. Read about AuDHD.
• Anxiety: With anxiety, the body can be on high alert, so impressions feel more threatening.
• PTSD: After trauma, sounds, smells or touch can trigger discomfort or memories. Read about PTSD.
• High sensitivity: A concept many people know, but it is not a diagnosis. In autism, sensory differences are linked to other characteristics, e.g. in social communication and the need for predictability.

Also read about signs of autism in adults.

What can help?

The goal is not to get used to input that hurts. The goal is to understand your own sensory system and arrange everyday life so there is energy for the things you want to do.

1. Map your senses. For a week or two, write down which situations drain you and what brings calm. The patterns are often clearer than you think.
2. Reduce what strains you. Noise-cancelling headphones, sunglasses, dimmed lighting, soft fabrics without labels and fixed seats away from doors and walkways.
3. Give your body what it seeks. A weighted blanket, firm pressure, walks or rhythmic movement can be calming for many.
4. Plan breaks. Schedule short breaks alone after meetings, shopping and social plans, before you are exhausted.
5. Think in terms of energy. See the day as a budget. A busy morning may mean that the afternoon needs to be quiet.
6. Tell others about your needs. When family, colleagues and managers understand what is happening, it becomes easier to agree on adjustments, e.g. working from home, a quiet room or leaving parties early.

Psychoeducation can help you understand your reactions and find the strategies that suit you.

When should you seek help?

It may be a good idea to be assessed if sensory input has limited your everyday life for a long time and you also recognise yourself in other autistic traits, e.g. that social situations take a lot of energy or that you have a strong need for predictability. A diagnosis can provide an explanation, a language for your needs and a basis for adjustments.

At Nordisk Psykiatri, sensory experiences are a standard part of the autism assessment. You can start with the RAADS-R screening, which also asks about the senses. You can be assessed without a referral and within 4 weeks. See prices, or contact us.

Frequently asked questions

Does everyone with autism have sensory sensitivity?

No, but it is very common. Some are mainly over-responsive, others under-responsive or sensory seeking, and many have a mix.

Is sensory sensitivity the same as being highly sensitive?

No. High sensitivity is a personality trait and not a diagnosis. In autism, sensory differences are linked to other characteristics and can affect everyday life more profoundly.

Can you train your way out of sensory sensitivity?

The sensory system rarely changes fundamentally. But with knowledge, adjustments and breaks, many people find that the strain becomes much smaller.

Can it get worse with age?

Sensory sensitivity often varies with stress, sleep and strain. In periods with many demands it can feel worse, and it typically lessens when everyday life has been adjusted.

Is there medication for sensory sensitivity?

There is no medication that directly treats sensory sensitivity. However, if you also have ADHD or anxiety, treating it can ease the overall strain. This is assessed individually by our doctor.

Sources

• American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders (DSM-5-TR), criterion B4 on hyper- and hyporeactivity to sensory input.
• Ben-Sasson, A. et al. (2009). A meta-analysis of sensory modulation symptoms in individuals with autism spectrum disorders. Journal of Autism and Developmental Disorders, 39, 1–11.
• Robertson, C. E. & Baron-Cohen, S. (2017). Sensory perception in autism. Nature Reviews Neuroscience, 18, 671–684.
• Raymaker, D. M. et al. (2020). Defining autistic burnout. Autism in Adulthood, 2(2), 132–143.
• Danish Health Authority (Sundhedsstyrelsen). Viden om autisme. sst.dk