The short answer
A highly sensitive person, or HSP, is someone born with a nervous system that takes in more detail and processes it more deeply. The psychologist Elaine Aron described the trait in the 1990s, and researchers estimate that around 15 to 20 percent of people have it. It is not a disorder or a diagnosis. Highly sensitive people tend to think things through carefully, get overwhelmed more quickly, feel emotions strongly, notice small sensory details and respond more to both good and bad surroundings. Living well with it is mostly a matter of rest, boundaries and using the strengths that come with it.
You leave a party early, not because you had a bad time but because the music, the voices and the bright lights left you feeling scraped raw. A film stays with you for days. You notice the tension in a room before anyone has said a word, and you can tell a friend is upset from the way they put their keys down.
If that sounds familiar, you may have heard the phrase “highly sensitive person” and wondered whether it is a real thing or just a kinder way of saying “too sensitive”. It is a real thing, it has been studied for three decades, and it is a lot more common than most people think.
What a highly sensitive person is
A highly sensitive person is someone who processes what they experience more deeply than most people. That includes what comes in through the senses, like sounds, smells and textures, and what comes in through other people: their moods, their words and the small changes in their faces.
The term comes from the psychologist Elaine Aron, who began studying the trait with her husband, Arthur Aron, in the early 1990s. Her book The Highly Sensitive Person came out in 1996, and the first scientific paper describing the trait, under the formal name of sensory processing sensitivity, followed in 1997.
Two things are worth saying straight away. First, it is a temperament trait, something you are born with, like being more or less outgoing. It is not an illness, a disorder or something a doctor diagnoses. Second, it is not rare. Aron and her colleagues estimate that around 15 to 20 percent of people are highly sensitive, and similar proportions have been found in more than a hundred animal species, from fruit flies to dogs. In every group, it seems, a minority is wired to notice more and pause before acting.
Is it the same as being shy or introverted?
No, although it is often confused with both. Shyness is a fear of being judged. Introversion is about where you get your energy: from time alone rather than time with others. High sensitivity is about how deeply you take things in.
Many highly sensitive people are introverts, but not all of them. Aron has estimated that about 30 percent of highly sensitive people are extroverts, people who love company and still need to retreat once the noise and stimulation build up. If you have ever been the life of a party and then needed a whole quiet day to recover, that may be you.
The four signs of a highly sensitive person
Aron sums up the trait in four parts, which she remembers with the word DOES. Not every highly sensitive person shows all of them equally, but most will recognise themselves in each.
1. Depth of processing
This is the heart of it. Highly sensitive people think things over. They weigh options, notice consequences and connect what is happening now to what happened before. In practice that can look like taking longer to decide, reading a message three times before answering, or lying awake turning over a conversation. It can also look like insight: seeing what others have missed.
2. Overstimulation
If you take in more, you fill up faster. Busy days, crowded places, deadlines and long stretches of being “on” can leave a highly sensitive person exhausted, irritable or close to tears, even when nothing bad has happened. This is not weakness. It is what happens when a system that processes everything deeply is given too much to process.
3. Emotional reactivity and empathy
Feelings run strong, good ones included. Highly sensitive people are often moved by music, art and nature, and they tend to pick up on other people’s emotions quickly. A brain imaging study published in 2014 by Bianca Acevedo, the Arons and colleagues found that, when looking at photos of their partners and of strangers, highly sensitive people showed more activity in brain areas linked to awareness and empathy.
4. Sensitivity to subtle details
Highly sensitive people notice small things: a faint smell, a slight change in someone’s tone, the scratchy label in a shirt, the hum of a fridge that nobody else can hear. Caffeine, hunger, pain and medicines may also affect them more.
Other signs people often recognise
Beyond the four core signs, highly sensitive people often describe some of these:
- needing to withdraw to a quiet, dark room after a busy day
- being startled easily
- finding it hard to perform well when someone is watching or timing them
- being deeply bothered by violence in films or the news
- having been called “too sensitive” or “shy” as a child
- arranging life to avoid upsetting or overwhelming situations
- having a rich inner life and vivid dreams
If you want to see how many of these apply to you, our Highly Sensitive Person Test walks you through it.
The upside that rarely gets mentioned
Most of what gets written about sensitivity is about coping, as if it were a problem to manage. But the research tells a more balanced story.
Psychologists such as Michael Pluess describe highly sensitive people as more responsive to their environment in both directions. In a hard, harsh or chaotic setting, they may struggle more than others. In a good one, with support, kindness and meaningful work, they often benefit more than others too. Researchers sometimes put it with flowers: some people are like dandelions, fine almost anywhere, and some are like orchids, wilting in poor conditions and blooming in good ones. A 2018 study by Francesca Lionetti and colleagues found evidence that people fall into three broad groups, low, medium and high in sensitivity, rather than just two.
In everyday life, the strengths tend to show up as care, conscientiousness, creativity, a good eye for detail and a strong sense of what other people need. Those are not small things.
When it gets hard
The difficulties are real, too. Highly sensitive people are more likely to feel stressed in loud workplaces, to take criticism to heart and to burn out when they keep pushing through overwhelm. Some studies have linked high sensitivity to more anxiety and low mood, especially in people who had a difficult childhood, which fits the idea that sensitivity amplifies whatever surrounds you.
It is also worth knowing that a few other things can look similar from the outside. Long-running stress, anxiety, depression, ADHD and autism can all involve feeling overwhelmed or very affected by noise and emotion. High sensitivity on its own does not need treatment, but if your sensitivity comes with low mood, constant worry, panic or trouble getting through the day, please talk to a doctor or a mental health professional.
How to live well as a highly sensitive person
You can’t switch the trait off, and you wouldn’t want to lose what comes with it. What you can do is shape your days so that it works for you rather than against you.
- Build in recovery time. After a busy morning or a big social event, plan something quiet. Ten minutes alone in a calm room can make the rest of the day possible.
- Lower the background noise. Earplugs, noise-cancelling headphones, softer lighting and fewer notifications all take a little load off a system that notices everything.
- Protect your sleep. Tiredness makes everyone more reactive, and highly sensitive people feel it sooner.
- Give yourself time to decide. “Let me think about it and get back to you” is a complete sentence.
- Name what you feel. Putting a precise word to a strong emotion calms it down. Our guide to How to Understand Your Emotions explains how.
- Choose your people. Spend more time with those who leave you feeling steadier and less with those who leave you drained.
- Stop apologising for it. Being moved by things, needing quiet and noticing more are not flaws. They are part of how you are made.
If you often feel more emotional than you would like, Why Am I So Emotional? looks at the everyday reasons that make feelings run high, which add up faster for sensitive people.
A small practice
Tonight, think back over your day and find the moment you felt most overloaded, and the moment you felt most at ease. Write down what was happening around you in each: the noise, the people, how rushed you were. Do it for a week. By the end you will have a short, personal list of what drains you and what restores you, and that list is worth more than any general advice.
For the bigger picture, see How to Understand Your Emotions.
Frequently asked questions
What is a highly sensitive person?
A highly sensitive person is someone born with a nervous system that takes in more detail and processes it more deeply. The psychologist Elaine Aron described the trait in the 1990s. It is a normal temperament trait, not a disorder.
How common is it to be highly sensitive?
Researchers estimate that around 15 to 20 percent of people are highly sensitive. The trait has also been found in more than a hundred animal species.
What are the signs of a highly sensitive person?
The four main signs are thinking things through deeply, getting overstimulated easily, feeling emotions strongly and noticing subtle details. Many highly sensitive people also need quiet time after busy days and are deeply affected by violence or cruelty.
Is being highly sensitive a mental illness?
No. It is an inborn trait, not a diagnosis. It can make stress, anxiety and low mood more likely in difficult conditions, so it is worth seeing a doctor if those are present, but the trait itself does not need treatment.
Can a highly sensitive person be an extrovert?
Yes. Elaine Aron has estimated that about 30 percent of highly sensitive people are extroverts. They enjoy company but still need time to recover once things get too loud or busy.