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Things to Know Before Consulting About Underarm Botox and Excessive Sweating

Hongdae Dermatology Skin Clinic 弘大美丽石医院 · ✦뷰티스닥터 합정역✦ · July 6, 2026

Hello. I’m Young-jin Wi from Beauty’s Doctor. ​ ​ In summer, the underarm areas of shirts can easily become wet, or you may find yourself repeatedly pressing them with a handkerchi...

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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: Hongdae Dermatology Skin Clinic 弘大美丽石医院

Original post date: July 6, 2026

Translated at: August 17, 2026 at 2:34 PM

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

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Hello.

I’m Young-jin Wi from Beauty’s Doctor.

In summer, the underarm areas of shirts can easily become wet,

or you may find yourself repeatedly pressing them with a handkerchief before every meeting,

making underarm sweating a source of concern.

If using deodorant does not make much difference,

and the sweating repeatedly occurs even when you are not nervous or hot,

it may be worth checking whether excessive sweating is involved.

Underarm Botox is one of the methods discussed

when addressing this type of sweating.

However, the criteria considered during a consultation can differ

depending on whether the concern is sweat, odor,

or both together.

What Is Underarm Excessive Sweating?

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Sweating is a natural bodily response

that helps regulate body temperature.

However, if a large amount of sweat repeatedly occurs in a specific area

without being significantly related to temperature or activity level,

it may be checked as excessive sweating.

When excessive sweating is limited to the underarms,

it is sometimes referred to as axillary hyperhidrosis.

The level of discomfort in daily life varies from person to person.

If your clothes often become wet,

if you feel uncomfortable raising your arms,

or if you are constantly conscious of it in social situations,

these may be reasons to seek a consultation.

What Does Botox Address in the Underarms?

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Underarm Botox is described as a method

that uses botulinum toxin type A

to temporarily reduce nerve signals

sent to the sweat glands.

It belongs to the same general category as Botox for expression lines,

but in the underarms, the focus is less on muscle movement

and more on the activity signals of the sweat glands.

When these signals are reduced,

the amount of sweat produced in response to stimulation

is discussed as gradually becoming regulated over time.

However, the same method does not necessarily apply

to every type of sweating.

The need for treatment and the approach may vary

depending on the area, amount, and pattern of sweating,

as well as your previous treatment history.

How Is the Treatment Area Identified?

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Even if underarm sweating feels evenly distributed across the area,

the points that are more active may differ from person to person.

For this reason, a consultation first examines

where and over what area the sweating is most pronounced.

When necessary,

a Minor’s test, also called the iodine-starch test,

may be used to identify the areas where sweating occurs visually.

After applying an iodine solution and starch,

the points where sweat appears become darker.

Using these results as a reference

can make it possible to assess more specifically

which areas to treat and at what intervals.

Before the test, it is also helpful to check in advance

whether deodorant or antiperspirant has been used.

The Duration Varies from Person to Person

The effects of the toxin are not permanent.

As time passes, nerve signals gradually recover,

and the pattern of sweating may return.

Underarm Botox for excessive sweating is sometimes described as lasting longer

than Botox for expression lines,

but it is difficult to state one exact duration for everyone.

The perceived duration may vary depending on activity level,

individual characteristics, the degree of sweating,

work environment, and the response to previous procedures.

If this is your first treatment,

it is generally appropriate to determine the next timing

after observing your response and how long the effects last.

It Should Be Considered Differently from Bromhidrosis

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Underarm sweat and odor

are often discussed together, but their causes are not completely the same.

Excessive sweating primarily refers to a condition involving a large amount of sweat,

while bromhidrosis involves odor-producing secretions

and the action of skin bacteria.

Simply put, excessive sweating is closer to

“the problem of sweating too much,”

while bromhidrosis is closer to

“the problem of being concerned about odor.”

Of course, both may occur together.

Therefore, during a consultation,

it is important to first distinguish

whether the main concern is the amount of sweat,

the odor, or both.

Underarm Botox is primarily discussed as a way

to regulate the flow of sweat,

so it is best considered separately

from methods that directly address odor itself.

Checking Your Condition Comes Before Automatically Choosing Treatment

Not everyone with excessive underarm sweating

necessarily needs Botox.

Lifestyle habits, the season, stress,

medications you are taking, or other health conditions

may also be related to sweating.

If odor is a greater concern than sweating,

the treatment approach may also be different.

The important thing is to first identify

what kind of discomfort you are currently experiencing,

rather than immediately deciding on underarm Botox.

It is necessary to consider the amount of sweat,

whether odor is also present,

the situations that cause discomfort in daily life,

and your previous management methods

before determining the appropriate scope of treatment.

Frequently Asked Questions

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Q. How long does underarm Botox last?

A. It varies from person to person.

The duration may differ depending on activity level,

the degree of sweating, individual characteristics,

and previous responses.

Q. Is a Minor’s test always necessary?

A. It is not necessary in every case,

but it can help identify the areas where sweating is most pronounced.

Whether testing is needed is best determined

after assessing your condition.

Q. Will it also improve odor?

A. Underarm Botox primarily addresses the amount of sweat.

Odor may involve other causes, such as bromhidrosis,

so it is advisable to discuss sweat and odor separately.

Thank you for reading this long post.

This was Young-jin Wi.

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