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The Reasons Hair Becomes Thinner, and Why You Need to Understand the Cause First

MOMO Plastic Surgery · 모모성형외과 · August 2, 2023

The Reasons Hair Becomes Thinner, and Why You Need to Understand the Cause First As time passes and we grow older, it is said to be only natural, but when you are actually going th...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: MOMO Plastic Surgery

Original post date: August 2, 2023

Translated at: April 24, 2026 at 3:45 AM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

The Reasons Hair Becomes Thinner, and Why You Need to Understand the Cause First image 1

As time passes and we grow older,

it is said to be only natural,

but when you are actually going through

the process yourself,

there seems to be nothing more disheartening.

Of course, if the overall body and each

part of it are not experiencing severe

signs of aging, it may feel relatively less difficult,

but if the changes caused by rapid aging are

serious, you may worry that you have

contracted an illness.

The Reasons Hair Becomes Thinner, and Why You Need to Understand the Cause First image 2

Among those changes, many people say that

healthy hair gradually loses strength and becomes thinner,

and they complain about this symptom.

If it is something you were born with,

it may not be a major issue, but if natural hair

becomes thinner later in life, it can be

considered a sign of hair loss. Once hair

starts to fall out, it may be difficult to

recover the same full volume as before,

so it is important to take proper action

as soon as these symptoms appear.

The Reasons Hair Becomes Thinner, and Why You Need to Understand the Cause First image 3

To do that, it is advisable to look into the

reasons hair becomes thinner, which can be

considered an early sign of hair loss, and find

ways to address them.

The reasons hair becomes thinner cannot be

pinpointed or stated with certainty as just one cause.

However, several factors are considered the main causes.

In general, it is known to occur when related to

changes in hormones such as testosterone and androgens.

In addition, not only that, but daily lifestyle habits

can also have a major impact, so if thinning hair is a concern,

it would be good to examine your usual habits and

see whether they can be improved.

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In summer, like now, lighter fashion styles often

unintentionally reveal body lines, so many people

try to diet in a hurry.

It would be good to follow a long-term plan,

but when there is not enough time, people tend to

adopt extreme dietary restrictions to lose weight quickly.

If you carry out such an overly harsh dieting method,

essential nutrients needed by the scalp and natural hair

may not be supplied evenly, and this can become

one of the reasons hair becomes thinner.

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Also, even if you are not trying to lose weight,

people who frequently eat spicy, greasy foods such as

instant foods that are easy to eat may also experience

thinning hair due to a lack of essential nutrients.

If this situation continues for a long time, symptoms

may worsen and lead to hair loss, so if your eating habits

include drastically reducing food intake or not consuming

a balanced range of nutrients, it would be better to

strive to eat more healthful foods.

And as social development advances and we live in a

fiercely competitive society, chronic fatigue caused by

overwhelming stress and overwork is often cited as an

inescapable, persistent problem.

It would be good if you could lower that stress level

with your own proper method of relieving it, but when

continuously exposed to such factors, you may suffer from

various physical and psychological illnesses.

When you are under stress or overworked, the balance of

the autonomic nervous system is disrupted, blood vessels

constrict, and blood circulation becomes impaired.

For that reason, even in such cases, nutrients may not be

delivered smoothly to the hair, so this can also act as

one of the reasons hair becomes thinner.

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The same applies when your sleep time is generally

inadequate and insufficient.

If you do not get enough sleep, your body cannot properly

rest and stress only accumulates.

This also causes the scalp's capillaries to constrict,

preventing nutrients from being supplied properly, so

natural hair can gradually become thinner, fall out,

and be lost, which requires caution.

Healthy natural hair typically contains about 10 to 15%

moisture, and this moisture mixes into the hair cortex

to give it shine and make movement smoother.

Chemical methods such as perms or excessive dyeing can

cause hair damage and can become reasons hair becomes thinner.

Also, if chemicals remain on the natural hair, they can

irritate even the scalp, and because natural hair has no

self-repair ability, it is especially important to care for

it carefully while it is still relatively healthy.

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Damaged hair should be protected with treatments or

clinic products so that no further harm is done.

And one unexpected reason hair becomes thinner is that it

can also happen if you do not dry your hair properly after

shampooing.

If you do not dry it completely, moisture provides a

good environment for microbes to thrive, and because it is

not fully dried, moisture evaporates into the air and

takes away even the moisture that remained on the skin.

This is the opposite of what one might think—that it is

adding moisture to the scalp.

If the damp condition continues, the skin releases more sebum

to balance the proper level of oil, and if this habit

continues, seborrheic dermatitis may also be triggered.

If you have inflammation on the scalp and it is in a severe

state, visiting the relevant institution promptly and taking

appropriate measures may be a path toward recovery.

The Reasons Hair Becomes Thinner, and Why You Need to Understand the Cause First image 8

Based on the information shared above, if you still have

healthy natural hair, it may help to read it carefully and

pay closer attention so you can care for it more carefully.

If you are already showing signs of hair loss, then without

delay, visiting an institution promptly for an accurate

diagnosis and appropriate treatment will serve as an

opportunity for improvement.

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