Understanding the highly sensitive brain
I’ll never forget eight-year-old Mia, who sat in my psychology practice last year, explaining why she couldn’t sleep. ‘The house makes too many noises at night,’ she said, her eyes wide with the kind of earnestness that breaks your heart. ‘And I keep thinking about how sad my teacher looked when that boy was mean to her.’
Mia’s mum had brought her in because teachers were calling her ‘oversensitive’ and ‘dramatic.’ Sound familiar? I’ve lost count of how many parents have sat across from me, worried sick because their child seems to feel everything more deeply than other kids.
Here’s what I’ve learnt, and what the research now confirms: these children aren’t broken. They’re not being dramatic. Their brains are simply wired differently—and in many ways, beautifully so.
The science behind the sensitivity
What we’re talking about here is something psychologists call Sensory Processing Sensitivity, or SPS. It’s not a disorder or a problem to be fixed. It’s a temperament trait found in roughly 20 to 30 per cent of children worldwide—that’s about one in every four or five kids in your child’s classroom.
Dr Elaine Aron, the pioneering researcher who first described this trait in the 1990s, discovered something remarkable: highly sensitive people’s brains actually process information differently. Recent neuroimaging studies by Bianca Acevedo and her colleagues have shown that when highly sensitive individuals look at emotional faces—whether happy or sad—their brains light up more intensely in areas related to empathy, attention, and what researchers call ‘depth of processing.’
Think of it this way: where most children’s brains might notice the obvious emotional cues, sensitive children’s brains are picking up the subtle undercurrents, the slight changes in tone, the way someone’s shoulders slump just a little. It’s like having a more sensitive antenna tuned into the emotional frequencies around them.
What this looks like in real life
Sarah, another client of mine, once told me she could tell when her parents had been arguing even when they thought they were hiding it well. ‘Mum’s voice gets different,’ she explained. ‘Not angry different, but careful different.’ That’s the sensitive brain at work—processing layers of information that others might miss entirely.
These children often:
Feel overwhelmed in busy places like shopping centres or school assemblies. They’re not being difficult; their nervous systems are simply processing more sensory information than they can comfortably handle.
Notice when something’s changed in their environment before anyone else does. They might comment on a new picture on the wall or ask why someone seems different today.
Have intense emotional reactions to movies, books, or even news stories. I’ve had parents tell me their seven-year-old was inconsolable after hearing about bushfires on the radio, not because they were directly affected, but because they could feel the pain of the families involved.
Take longer to warm up in new situations. They’re not being shy for the sake of it—they’re taking time to process all the information coming at them before they feel safe to engage.
Show remarkable empathy and kindness from an early age. These are often the children who comfort a crying classmate or worry about whether the family pet is happy.
The ‘for better and for worse’ effect
Here’s where it gets interesting, and where the research really shines a light on something crucial. Sensitive children don’t just feel the difficult emotions more intensely—they also experience positive emotions more deeply. It’s what researchers call ‘differential susceptibility.’
When these children are in supportive, understanding environments, they don’t just do as well as other children—they often outperform them. Studies have consistently shown that highly sensitive children who receive warm, responsive parenting develop better social skills, show more creativity, and have fewer behavioural problems than their less sensitive peers in the same positive environments.
But—and this is the important bit—when the environment is harsh, unpredictable, or unsupportive, sensitive children struggle more than others. It’s not that they’re weaker; it’s that their increased sensitivity makes them more responsive to everything in their environment, good and bad.
I think of it like tending a garden. Orchids and roses need different care than the hardy native grasses that’ll grow anywhere. That doesn’t make them less valuable—quite the opposite. With the right conditions, they create something extraordinary.
The gifts hidden in the sensitivity
I’ve watched sensitive children grow into remarkable adults. They become the doctors who truly listen to their patients, the teachers who spot the struggling student before anyone else notices, the artists who create work that moves people to tears, the friends who know exactly what to say when life gets tough.
The research backs this up beautifully. Acevedo’s neuroimaging studies found that when highly sensitive people see someone in distress, their brains don’t just register the emotion—they also show increased activity in areas related to action planning. In other words, they’re not just feeling the other person’s pain; they’re already thinking about how to help.
That’s not weakness. That’s a superpower that our world desperately needs.
Supporting your sensitive child
So how do we nurture these remarkable little humans? It starts with understanding that their sensitivity isn’t something to be ‘toughened up’ or trained out of them. It’s a fundamental part of who they are, like having brown eyes or being left-handed.
Create predictability and calm spaces. Sensitive children thrive on routine and knowing what to expect. That doesn’t mean their lives need to be boring—it means they need time to process and prepare for changes. Give them a heads-up before transitions and create quiet spaces where they can retreat when the world feels too much.
Validate their feelings before offering solutions. When your child comes to you upset about something that might seem minor, resist the urge to immediately fix it or tell them it’s not a big deal. Instead, try something like, ‘I can see this is really bothering you. Tell me more about what happened.’ Their feelings are real and valid, even if the trigger seems small to you.
Celebrate their depth. Point out when their sensitivity becomes a strength. ‘I noticed how gentle you were with your baby cousin today’ or ‘You really understood how frustrated your friend was feeling, didn’t you?’ Help them see their sensitivity as a gift, not a burden.
Teach emotional boundaries. Sensitive children often absorb other people’s emotions like little sponges. Help them learn the difference between empathy—understanding how someone else feels—and taking on those feelings as their own. Simple phrases like ‘That’s their feeling, not yours’ can be incredibly helpful.
Work with their teachers. I always encourage parents to have a conversation with their child’s teacher early in the school year. Most teachers want to support all their students, but they might not understand that the child who seems withdrawn or emotional might actually be processing the world more deeply than their peers.
The misunderstandings to watch for
Unfortunately, our society often misinterprets sensitivity. I’ve seen too many bright, caring children labelled as ‘difficult’ or ‘too emotional’ when what they really need is understanding and support.
Some people assume sensitive children are weak or need to be ‘toughened up.’ This couldn’t be further from the truth. It takes tremendous courage to move through the world feeling everything so deeply. If anything, these children are showing us what emotional bravery looks like.
Others worry that validating a child’s sensitivity will make them more sensitive. That’s like worrying that acknowledging a child’s need for glasses will make their eyesight worse. Sensitivity is an innate trait—you can’t create it or cure it. But you can certainly influence whether it becomes a source of strength or struggle.
Looking to the future
As I write this, I’m thinking about all the sensitive children I’ve met. Many of them are now adults doing incredible things in the world—not in spite of their sensitivity, but because of it.
The research continues to grow, and what we’re learning is extraordinary. Recent studies are exploring how sensitivity interacts with attachment relationships, how it influences learning styles, and how we can better support these children in schools and communities.
What gives me hope is seeing the shift in understanding. When I first started studying psychology, ‘sensitivity’ was often pathologised. Now, we’re beginning to recognise it for what it truly is: a natural variation in human temperament that, when supported properly, can be a tremendous gift.
If you’re parenting a sensitive child, know that you’re raising someone who has the potential to make our world more compassionate, more creative, and more connected. Yes, it comes with challenges—all the best things in life do. But with understanding, patience, and the right support, these children don’t just survive; they absolutely flourish.
Your sensitive child isn’t too much. The world might just be too little prepared for their depth. And that’s something we can change, one understanding parent, one educated teacher, one compassionate community at a time.
After all, in a world that often rewards loudness over listening and quick reactions over thoughtful responses, perhaps what we need most are the people who pause, feel deeply, and respond with wisdom. Those are exactly the kinds of people sensitive children grow up to be.
Research References
Acevedo, B. P., Aron, E. N., Aron, A., Sangster, M. D., Collins, N., & Brown, L. L. (2014). The highly sensitive brain: An fMRI study of sensory processing sensitivity and response to others’ emotions. Brain and Behavior, 4(4), 580-594.
Aron, E. N., & Aron, A. (1997). Sensory-processing sensitivity and its relation to introversion and emotionality. Journal of Personality and Social Psychology, 73(2), 345-368.
Aron, E. N., Aron, A., & Jagiellowicz, J. (2012). Sensory processing sensitivity: A review in the light of the evolution of biological responsivity. Personality and Social Psychology Review, 16(3), 262-282.
Boyce, W. T., & Ellis, B. J. (2005). Biological sensitivity to context: I. An evolutionary-developmental theory of the origins and functions of stress reactivity. Development and Psychopathology, 17(2), 271-301.
Greven, C. U., Lionetti, F., Booth, C., Aron, E. N., Fox, E., Schendan, H. E., … & Homberg, J. (2019). Sensory processing sensitivity in the context of environmental sensitivity: A critical review and development of research agenda. Neuroscience & Biobehavioral Reviews, 98, 287-305.
Lionetti, F., Aron, A., Aron, E. N., Burns, G. L., Jagiellowicz, J., & Pluess, M. (2018). Dandelions, tulips and orchids: evidence for the existence of low-sensitive, medium-sensitive and high-sensitive individuals. Translational Psychiatry, 8(1), 24.
Pluess, M., Assary, E., Lionetti, F., Lester, K. J., Krapohl, E., Aron, E. N., & Aron, A. (2018). Environmental sensitivity in children: Development of the Highly Sensitive Child Scale and identification of sensitivity groups. Developmental Psychology, 54(1), 51-70.
Slagt, M., Semon Dubas, J., van Aken, M. A., Ellis, B. J., & Deković, M. (2018). Sensory processing sensitivity as a marker of differential susceptibility to parenting. Developmental Psychology, 54(3), 543-558.
Sperati, A., Acevedo, B. P., Dellagiulia, A., Fasolo, M., Spinelli, M., D’Urso, G., & Lionetti, F. (2024). The contribution of sensory processing sensitivity and internalized attachment representations on emotion regulation competencies in school-age children. Frontiers in Psychology, 15, 1357808.
