On the temperament known as HSP

You feel completely exhausted when you are in a crowd.
You notice someone's bad mood immediately.
Loud noises, bright lights, and the bustle around you affect you a little more than they do others.
You may have blamed yourself for a long time, thinking, "Am I just high-strung?" "Am I weak?" or "Maybe I'm just overthinking things."
But perhaps that is not a flaw or a sign of immaturity, but rather the high level of sensitivity you were born with.

What is HSP?

HSP stands for Highly Sensitive Person, a term that means "a person who is very sensitive."
It was proposed in the 1990s by American psychologist Elaine N. Aron. Academically, it is studied as a temperamental trait called SPS (Sensory Processing Sensitivity).
Here, please let me first share something important.
HSP is neither a disease nor a disorder.
Just like your height or which hand you use, it means you are on the "sensitive side" of the spectrum of neurological sensitivity that everyone is born with.
It is said that about one in five people, or approximately 15-20% of the population, has this temperament (in recent years, some studies suggest it exists more broadly, viewing it as a continuum).

Looking at it professionally — The four pillars of "DOES"

Aron explained that HSPs possess four specific characteristics. These are called DOES, an acronym for the first letters of each. It is believed that one is an HSP only when all of these are present.

D — Depth of processing

You think about things not just on the surface, but deeply. You ruminate on a single word or event over and over, savoring it from various angles. That is why you have deep insight and are good at grasping the essence of things. On the other hand, it can take you time to make decisions, or you may get tired from thinking too much.

O — Overstimulation

Because you receive more information than others, your capacity for stimulation fills up quickly. Crowds, bustling streets, long periods of socializing, and a packed schedule. Feeling completely drained by such things is not due to a lack of physical stamina, but because your nervous system is working so hard.

E — Emotional reactivity and Empathy

Your emotions move deeply, and you empathize deeply with the feelings of others. You might feel someone else's sadness as if it were your own, or be strongly moved by movies or music. This high level of empathy can make your connections with people very rich.

S — Sensitivity to Subtleties

You notice even the slightest changes. A faint clouding of someone's expression, a change in the atmosphere of a room, or a smell or sound that is different from usual. You possess the power to naturally perceive subtle details that others might overlook.

Why are you sensitive? What is happening inside your body

It is painful when people tell you, "It's just a matter of your mindset."
However, biological evidence for HSP sensitivity is gradually being discovered.
Brain imaging studies have reported that in people with high HSP tendencies, the parts of the brain involved in empathy, awareness, and deep processing (such as the insular cortex and mirror neuron system) work more actively. The involvement of innate genetic factors has also been pointed out.

The other side of "vulnerability" — The power to thrive in a good environment

It is true that highly sensitive people are more easily hurt than others in harsh environments. However, research has also shown that this same sensitivity allows them to grow significantly more than others in a warm and secure environment (this is called "Vantage Sensitivity"—the ability to benefit from a good environment).

One researcher compared it to flowers.
· Dandelions bloom robustly in any soil.
· Orchids are easily affected by their environment and will wither if treated roughly. But when cared for with attention, they bloom more beautifully than anyone else.
(It is said that there are also "tulips" in between.)
Your sensitivity has two faces: the face of being easily hurt, and the face of having the power to bloom deeply and richly.
The issue is not the sensitivity itself, but rather what kind of environment you place yourself in and how you care for yourself.

Distinguishing HSP from other things

Now that the term HSP has become widespread, there are a few things I would like to convey with caution.
HSP is not a medical diagnosis.
It is not listed in diagnostic criteria such as the DSM or ICD; it is strictly a concept that describes a "temperament."
Furthermore, sensitivity and fatigue can occur for reasons other than HSP. For example:
· Developmental traits (such as ASD or ADHD)
· Anxiety or depression
· Reactions due to trauma (emotional wounds)
These can look very similar to HSP at first glance and are easily confused (also, one may have the HSP temperament while simultaneously dealing with these).
Therefore, please do not endure things and neglect the care you need by telling yourself, "It's just because I'm an HSP."
If you feel that your daily life is difficult, I hope you will feel safe relying on a professional (such as a psychosomatic physician, psychiatrist, or mental health professional) who can carefully look at the background of your situation with you.

To live gently with your sensitivity

◇ Adjust the 'amount' of stimulation yourself
Use items that soften stimulation even a little, such as light (visual), sound (auditory), scents (olfactory), and comfortable, non-constricting clothing (tactile).
Try not to pack your schedule too tightly.
After a busy time, consciously set aside time to spend quietly alone.
Resting properly when you are tired also leads to necessary recovery.
◇ Have boundaries
Because you easily pick up on other people's feelings, the boundary between your emotions and theirs tends to become blurred.
Gently draw a line, saying to yourself, 'This is how they feel, and this is how I feel.'
◇ Do not blame your sensitivity
Instead of saying, 'I worried too much again,' gradually change how you interpret it to, 'I am capable of feeling things so deeply.'
And when you become able to forgive and accept yourself as you are, your heart will feel lighter and more relaxed.
I believe that sensitivity is also your precious strength, allowing you to be kind to others and deeply appreciate beautiful things.

Conclusion

Being sensitive means that you are living while receiving a great deal from the world.
While that can be tiring, you possess a heart that can feel things just as richly.
I hope you will embrace that sensitivity not as something that needs to be 'fixed,' but as something to be treated with care and nurtured.

May you be able to spend your time feeling a little more at ease, just as you are.

Thank you for reading until the end.

This article is intended for general information purposes. For diagnosis or individual support, please consult a medical institution or professional organization.