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Why Hair Becomes Thinner: Understanding It Properly Is Essential

MOMO Plastic Surgery · 모모성형외과 · February 21, 2023

Why Hair Becomes Thinner: Understanding It Properly Is Essential More serious than hair loss itself is the symptom in which the hair strand itself becomes thinner, known as hair mi...

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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: February 21, 2023

Translated at: April 24, 2026 at 5:06 AM

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

Why Hair Becomes Thinner: Understanding It Properly Is Essential image 1

More serious than hair loss itself

is the symptom in which the hair strand itself

becomes thinner, known as hair miniaturization. These days, modern people living in

the current era are accumulating stress and fatigue

due to more difficult living conditions caused by

job hunting, work, and sharply rising prices, and

they are often maintaining poor physical condition. Because of this, irregular eating habits that make it

hard to eat regular meals on time and lack of sleep

are frequently undermining health. Perhaps for this

reason, concerns about hair loss among young people

in their 20s and 30s are reportedly increasing rapidly.

Why Hair Becomes Thinner: Understanding It Properly Is Essential image 2

Even if there is no problem with the scalp, natural

hair goes through repeated growth cycles such as the

growth phase, catagen phase, resting phase, and

formation phase, so about 70 strands on average fall

out per day. However, if more than 100 hairs a day

continue to fall out, or if the hair gradually becomes

thinner and loses strength, this may indicate that hair

loss has occurred, and you can suspect early symptoms.

Why Hair Becomes Thinner: Understanding It Properly Is Essential image 3

Compared with usual, you may experience a situation

where the number of natural hairs falling out increases,

or rather than the shedding speed becoming faster,

only the thickness of the natural hair becomes thinner.

Generally, when people think of hair loss, they tend to

think only of a large amount of hair falling out or the

appearance after it has already fallen out, but thinning

hair can be considered one of the symptoms of hair loss.

If the symptoms have already appeared, it is advisable

to recognize this as a warning sign that requires prompt

response and manage it quickly.

Why Hair Becomes Thinner: Understanding It Properly Is Essential image 4

The reason hair becomes thinner may also occur when

changing hairstyles. If you frequently get perms or dye

your hair, strong chemicals can irritate and weaken the

hair roots and natural hair, and sebum concentrated

around the hair follicles may not spread evenly. Also, as aging weakens cell regeneration, damaged

natural hair gradually loses strength and becomes

thinner, and as breakage repeats, it can eventually

develop into hair loss.

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In addition, pulling natural hair too hard or tying it up

as you normally do can also be one of the causes of

why hair becomes thinner. Therefore, rather than

repeating frequent style changes over a short period of

time, it may be advisable to proceed with sufficient

intervals through consultation with the physician in

charge.

Why Hair Becomes Thinner: Understanding It Properly Is Essential image 6

You may think that genetics is the biggest factor in hair

loss. If you have a family history, you should focus on

the condition of your natural hair and the reasons why

hair becomes thinner. Since hair loss is greatly affected

by male hormones, it is recommended that you adjust

lifestyle habits that excessively increase testosterone.

For those who have already been diagnosed, rather

than delaying and worsening the symptoms, it may be

better to visit a related medical institution quickly and

receive a prescription for medication. If a lot of hair has

already been lost, it may be worth considering a

transplant procedure, etc.

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At a related medical institution, treatment and care can

be carried out at the same time, so you can receive an

accurate diagnosis of the current reason your hair is

becoming thinner and its condition, prevent the overuse

of medication, and combine it with care that can

maximize various effects. This may be the most precise

and effective method. This is because there are cases

where the situation worsens due to incorrect care based

on one’s own judgment. Therefore, if you consistently

follow the guidance and continue care, you can expect

the thickness of natural hair to return and proper growth

to resume.

Why Hair Becomes Thinner: Understanding It Properly Is Essential image 8

Just as the body becomes healthier overall when blood

circulation is smooth, the same applies to the scalp: the

hair follicles become healthier and natural hair can grow

well. The reason hair becomes thinner may be that the

nutrients that should be delivered to the hair are not

being properly transferred, causing it to gradually look

dry and thin. Therefore, massaging the scalp evenly with

your fingers during daily life or when washing your hair

can help blood flow reach the hair follicles. Applying

pressure gently for about 3 minutes, 2 to 3 times a day,

may also be helpful.

Why Hair Becomes Thinner: Understanding It Properly Is Essential image 9

If an oily scalp is the reason hair becomes thinner,

sebum and dust can block the hair follicles and have a

negative effect on condition and health, so scalp scaling

can be helpful. On the other hand, for dry scalps, rather

than removing flaking skin, it may be more effective to

softly calm it through moisturizing and strengthen the

skin barrier. In addition, to keep the strength of the hair

roots supporting the hair from weakening, improving

eating habits and making sure to consume sufficient

protein and B vitamins will likely work favorably for

strengthening.

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Getting enough sleep is also beneficial, so it is good to

make an effort to improve sleep quality, and it is

recommended that you take proper rest so that stress

and fatigue do not build up.

Why Hair Becomes Thinner: Understanding It Properly Is Essential image 11

In fact, even among people undergoing hair loss

treatment, rather than focusing on the number of hairs

disappearing, they sometimes pay attention to each

individual strand and focus on thickness. This is because

the treatment plan differs depending on the current

condition, and the effect can also vary.

If thinning hair is causing you significant concern,

changing your basic lifestyle habits may also be helpful,

and this may in turn lead to improvement in the current

reason for concern about hair becoming thinner.

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