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The effect of medical hair removal with less pain and the number of treatments required by heat s...

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Seiko Soyama
Dr. Seiko Soyama

Seiko Medical Beauty Clinic Kagoshima-in

Japan Dermatological Association member Japanese Society for Medical Hair Removal Member of Japan Society of Aesthetic Dermatology Japan Medical Epilation Association

1人のドクターがいいねしています

Medical institution with Dr. Seiko Soyama

Seiko Medical Beauty Clinic Seiko Medical Beauty Clinic
Seiko Medical Beauty Clinic Fukuoka-in
Inquiries to Kagoshima-in: 0120-172-117
Inquiries about Fukuoka-in: 0120-126-265

The effect of medical hair removal with less pain and the number of treatments required by heat storage type hair removal

There are two general methods for medical laser hair removal that have a long-term hair removal effect: "shot hair removal" and "heat storage hair removal". Shot-type hair removal is often used as medical hair removal, but it is often painful depending on the site and skin condition because it uses strong heat energy. Thermal storage hair removal is a relatively new technique that causes less pain and takes less time to perform one treatment, but it is said that the hair removal effect does not appear immediately.

Please understand the reason why heat storage type hair removal is less painful and the difference from shot type hair removal, and select and receive medical hair removal that suits you.

Two medical laser hair removal with long-term hair removal effect

Medical laser hair removal includes shot type hair removal and heat storage type hair removal. Some medical institutions describe shot type hair removal as HR (Hair Removable) hair removal and heat storage type hair removal as SHR (Super Hair Removable) hair removal.

In shot-type hair removal, a handpiece is placed on the part to be removed, a single laser that generates strong heat energy is irradiated, and each irradiation moves on the skin little by little. Thermal storage hair removal is a procedure that heats hair roots by continuously irradiating a low-power laser while sliding the handpiece on the skin .

Although the irradiation method is different, the shot type and heat storage type hair removal method destroys the parts and cells involved in hair growth, so the effect of medical laser hair removal is said to be long-term.

Medical laser hair removal acts on cells and tissues that control hair growth and leads to hair removal

A laser is a type of electromagnetic wave. By artificially extracting and amplifying one wavelength from various wavelengths of light, it has the characteristic of advancing in a straight line sharper than light, and has the property of being easily absorbed only by specific substances and dyes. Medical laser hair removal is a procedure that aims to remove hair by destroying only the cells and tissues that control hair growth by using the properties of the laser.

In addition, it is said that laser irradiation with an appropriate output has a low risk of causing great damage to cells and tissues other than the cells and tissues that control hair growth, such as the skin surface.

Mechanism of medical laser hair removal seen from the structure of hair

Illustration of hair structure and the action of heat storage type hair removal

Shot-type hair removal uses a high-energy laser to act on melanin, which instantly destroys the bulge area below the sebaceous gland opening and the dermal papilla in the hairball. The bulge area is the part that instructs the hair to grow, and the hair papilla has the role of sending nutrients to the cells that grow as hair (hair matrix cells), so by destroying these, new hair can be created. You will not be able to grow.

Dermal papilla is destroyed as a hair was missing immediately, because the bulge region come grow again new hair if not destroyed, in order to obtain a long-term hair removal effect, in addition to the hair papilla bulge It has become clear in recent years that the destruction of areas is also important.

Heat storage type hair removal continuously irradiates a low-power laser to gradually store heat around the hair follicles, which are the organs that generate hair. With the stored heat, it is a mechanism that leads to hair loss by giving a thermal stimulus to the bulge area and dermal papilla that control hair growth, as well as the substance that transmits information on hair growth between cells.

Heat storage type hair removal stores heat at about 45 ° C to 55 ° C, so there is less pain during the procedure.

The pain of shot-type hair loss is often described as "pain like a rubber band," and you may feel strong pain depending on the part because it is irradiated with a high-power laser.

It is said that heat storage type hair removal continuously irradiates a low-power laser and acts on the dermal papilla and bulge area with heat of about 45 ° C to 55 ° C, so the laser irradiation surface feels warm and there is almost no pain. I will. Therefore, it is possible to remove hair from people who are not good at pain and children, and it is said that it is suitable for a wide range of people.

However, depending on the thickness and amount of hair and the treatment site, you may feel a tingling stimulus, and in men's beard hair removal and VIO hair removal, the hair is dense and thick, so it tends to be painful.

There are individual differences in how you feel pain, so if you feel any abnormalities or pain on your skin, please do not hesitate to tell the staff. Pain can be reduced by anesthesia and adjustment of laser output.

Number of times and progress until hair comes off by heat storage type hair removal

Hair storage type hair removal starts to come off after 2 to 4 weeks

In heat storage type hair removal, low-power lasers are fired continuously to store heat, causing damage and hindering hair growth, resulting in hair removal, so it takes about 2 to 4 weeks for hair to begin to fall out.

It may be felt as "ineffective" because it has no immediate effect.

Shot-type hair removal is said to have a hair removal effect as early as the day of treatment. This is called "pop-up", and it is a phenomenon in which the temperature around the hair follicle rises sharply by irradiating with a high-power laser, the hair root part is destroyed, and the hair comes out from the root. Since the pop-up continues for several days, it is said that shot-type hair removal is easy to feel the hair removal effect after treatment.

Pop-ups basically do not occur with heat storage type hair removal. It is said that there are cases where it is felt that there is no effect because hair rarely comes off from the day.

Heat storage type hair removal has a short treatment time and a small number of treatments

Shot-type hair removal irradiates a high-power laser one by one and reacts with melanin contained in the hair to damage the bulge area and dermal papilla. On the other hand, in heat storage type hair removal, the treatment is performed with low output and continuous irradiation.

Estimated treatment time for each site of heat storage type hair removal

In heat storage type hair removal, it is possible to irradiate a wide range of lasers in a short time by using a motion technique that slides the laser irradiation surface on the skin in an arc.

It is said that heat storage type hair removal requires less time for each treatment than shot type hair removal, and the number of treatments required to complete hair removal tends to be smaller.

Part Estimated treatment time (once)
Whole face About 10 to 30 minutes
Both sides About 10 to 20 minutes
Arms / legs About 10-40 minutes
VIO About 10 to 20 minutes each
Whole body Around 60 to 90 minutes

Estimated number of heat storage type hair removal treatments

Since the desired skin types such as "I want to make the hair a little thinner" and "I want to make it hairless" are different, there are individual differences in the number of treatments required. It is said that the more heat storage type hair removal is performed, the more difficult it is for new hair to grow.

Number of treatments Estimated hair removal effect by heat storage type hair removal
1 time (first time)・ Hair will come off 2 to 4 weeks after receiving the first treatment. ・ Slight amount of hair loss may be felt.
Around 5 times・ The amount of hair is reduced by half. ・ Generally, it is said that the hair becomes inconspicuous.
8 to 11 times・ Generally, it is said that a sufficient hair removal effect can be obtained. ・ Even if hair remains, a small amount

In the case of male beards, male hormones also have a hair-growth effect, so it tends to require more treatments than the above guidelines.

Thermal storage hair removal does not mean that the hair will come off in a single treatment and the skin will remain smooth forever. However, it is said that repeated treatments will lead to a long-term hair removal effect and a condition in which new hair is difficult to grow .

The reason why the hair removal treatment does not end in one time is to match the hair growth cycle

Hair has a cycle called the "hair cycle" from growth to when it stops growing and falls off. The hair cycle has four phases: early growth, growth phase, regression phase, and telogen phase, and it is said that the growth phase is the most suitable timing for undergoing medical laser hair removal .

Image illustration of hair cycle

  • Early growth: The period when hair matrix cells divide and new hair is produced
  • Growth period: When the hair is growing and contains a lot of melanin, the laser is most effective.
  • Regression period: The period when old hair root cells die and hair growth stops.
  • Telogen: The time when hair growth stops and it comes off with shampoo or brushing

When the hair falls out during the telogen period, cell division of the hair matrix cells occurs again, and new hair grows soon. The proportion of growing hair is about 90% for hair, but only 20% to 30% for armpits, VIO, arms and legs, and other hair is in catagen or telogen. Therefore, it is necessary to undergo multiple treatments according to the timing when the hair in the catagen or telogen phase becomes the growth phase.

Estimated interval for heat storage type hair removal

Since the hair cycle in which hair grows and falls off differs depending on the site, the guideline for the treatment interval also varies from site to site.

Part Estimated treatment interval
Aside 4 to 6 weeks
Chest 4 to 6 weeks
VIO 4 to 6 weeks
Beard (male) 6-8 weeks
Arms / legs 8 to 10 weeks
back 8 to 10 weeks

In the case of whole body hair removal, the treatment interval can be changed for each part from the second time onward, or the whole body can be treated every time according to the part where the hair cycle interval is long.

Features of heat storage type hair removal that can be seen in comparison with shot type hair removal

Thermal storage hair removal can also be applied to skin that contains a lot of melanin

Since heat storage type hair removal is not a hair removal treatment that acts on melanin as a medium, the irradiation method is different from the shot type that aims to remove hair by irradiating a laser that acts on melanin with high output. Heat storage type hair removal is an irradiation that gradually stores heat in the hair growth tissue such as hair roots with a low power laser and damages it, so it is said that the treatment can be performed regardless of the color of the skin.

If there are large dark spots or moles, a protective sticker is attached to prevent the risk of burns, or the laser is irradiated while avoiding moles, but if it is a small and thin mole, the laser is not attached. May be irradiated.

Shot hair removal may not be possible because it reacts to melanin on the skin.

Shot-type hair removal has a high output of the laser to irradiate, and when it is absorbed by melanin, strong heat energy is generated instantly. Therefore, areas with dark pigments that contain a lot of melanin, moles and blemishes, pigmentation and tattoos cannot be irradiated because of the high risk of burns.

Thermal storage type hair removal can be expected to have an effect on hair growth, etc.

Shot-type hair removal uses the heat energy generated by the laser being absorbed by melanin. Therefore, hair that contains melanin can be damaged and removed, but hair that is low in melanin, such as downy hair and gray hair, cannot be expected to have a hair removal effect.

On the other hand, heat storage type hair removal is not an irradiation method that generates heat energy using melanin as a medium, so it is expected to have an effect that leads to hair loss even for hair growth.

Thermal storage hair removal causes less damage to the skin

Shot-type hair removal is performed by irradiating a high-power laser. Therefore, in order to relieve the feeling of heat generated on the skin, a hair removal machine equipped with a cooling function is generally used.

Since heat storage type hair removal irradiates a low-power laser, it is said that there is little damage to the skin because the temperature does not rise sharply at the irradiated area. Irradiation with a heat storage type hair removal laser stores heat around the hair follicles at around 45 ° C to 55 ° C, but the temperature does not reach a level high enough to cause burns, so the risk of skin damage is low.

Heat storage type hair removal machine mainly used in medical institutions

Lasers have different substances that are easily absorbed and the depth that they reach, depending on the wavelength. The wavelength that is easily absorbed by melanin is 600 nm to 1200 nm, and it is said that the shorter the wavelength in this wavelength range, the easier it is to be absorbed. The longer the wavelength, the lower the absorption rate, so there is less pain and the effect tends to be milder.

Machine Laser type (wavelength) Features seen from the wavelength of the laser
Soprano ice cream Diode laser (800nm-810nm) Can irradiate a wide range of skin types and hair growth such as sunburn and other dark-pigmented skin
Soprano Ice Platinum / Soprano Titanium Alexandrite laser (755nm) Diode laser (800nm-810nm) YAG laser (1064nm) Can irradiate 3 wavelengths at the same time, and can efficiently remove hair with different thickness and hair follicle depth.
Mediostar NeXT PRO / NeXT PRO ALEX / NeXT PRO XL Diode laser (808nm-940nm) Can irradiate a wide range of skin types and hair growth such as sunburn and other dark-pigmented skin
Motors AX Alexandrite laser (755nm) It is not possible to irradiate dark-pigmented skin such as sunburn, but high hair removal efficiency can be expected at wavelengths that are easily absorbed by melanin.

(* 1nm = 1 billionth of a meter)

Compare the price of heat storage type hair removal with shot type hair removal

Although it depends on the medical institution, heat storage type hair removal tends to be more expensive than shot type hair removal.

Part Shot type (1 time) Heat storage type (1 time)
Whole face 10,000 yen to 30,000 yen 16,000 yen to 35,000 yen
Aside 3,500 yen to 6,500 yen 5,000 yen to 10,000 yen
Upper arm (both arms) 15,000-20,000 yen 15,000-30,000 yen
Fingers and insteps 3,500 yen to 10,000 yen 4,000 to 20,000 yen
Thighs 18,000-30,000 yen 27,000-45,000 yen
Below the knee (lower leg) 13,000 yen to 30,000 yen 17,000 yen to 38,000 yen
Chest 12,000 yen to 20,000 yen 20,000 yen to 35,000 yen
abdomen 12,000 yen to 20,000 yen 17,000 yen to 30,000 yen
buttocks 12,000 yen to 20,000 yen 13,000 yen to 30,000 yen
Whole back 25,000-40,000 yen 36,000 to 56,000 yen
V 6,000 yen to 15,000 yen 8,000 to 20,000 yen
I 6,000 yen to 15,000 yen 8,000 to 20,000 yen
O 5,000 yen to 15,000 yen 6,400 yen to 20,000 yen
Male beard 9,000 yen to 15,000 yen 15,000-30,000 yen

Precautions for heat storage type hair removal

Precautions when undergoing heat storage type hair removal

  • Refrain from tweezers within 1 month of receiving the treatment

Since heat storage type hair removal irradiates a laser that acts on hair roots, it is said that the hair removal effect cannot be obtained if self-treatment with tweezers is performed before surgery. Please refrain from self-treatment by tweezers within one month of receiving the treatment.

  • Shaving treatment required in advance

You must have a razor shave the day before or on the day of the procedure. If you do not shave when you receive the procedure, some medical institutions will incur a shaving fee during the procedure. If you find it difficult to treat yourself, such as on your back, you can ask the staff to shave before you undergo the procedure.

  • VIO hair removal during menstruation is not possible

Even during menstruation, it is possible to receive treatment in areas other than VIO, but it is said that it is easier to feel pain due to laser irradiation than usual. If you are worried about the pain, you should avoid the procedure during your period.

  • After surgery, avoid strong UV rays and refrain from sauna, strenuous exercise and drunkenness.

Immediately after the procedure, the skin is in a delicate state due to the heat energy of the laser. Avoid strong UV rays, and refrain from using saunas that promote blood circulation, strenuous exercise, and drinking, as they can cause swelling and redness. You can take a shower from the day of the event, but you need to be careful about long-term bathing and strong friction on the irradiated area.

Risks and side effects of thermal storage hair loss

  • Redness and tingling sensation

Heat storage type hair removal uses a handpiece to irradiate the skin with a laser so that it slides, and generates heat energy around the hair follicles to destroy the hair growth tissue. As a result, heat is transferred to the irradiated area, and you may feel a tingling stimulus such as redness or sunburn, but it is said that it will subside within a few days. In addition, some medical institutions may prescribe an ointment, so follow the instructions of your doctor.

If an abnormality such as persistent inflammation occurs, it may cause pigmentation, so it is important to seek medical attention immediately at the medical institution where the hair was removed.

  • Folliculitis

Folliculitis can develop when bacteria infect pores that have been damaged by the heat of laser irradiation. In most cases, folliculitis can be controlled by keeping the treated area clean, so do not touch the hair loss area more than necessary after surgery.

  • Coarse hair

There is a theory that the cause of coarse hair, which is a phenomenon in which the hair in the hair loss area becomes thicker, is insufficient output of irradiation energy, but it has not been clarified yet. It tends to be more common in hair loss on the upper arm and face line.

  • Mole becomes thinner

Side effects may cause the moles present at the treatment site to become thinner. Also, in the case of small moles, they may be removed by irradiation, so please inform the practitioner in advance of the moles you want to keep.

Those who cannot receive heat storage type hair removal

  • Those who have untreated inflammation or scars on the desired area of hair loss
  • Pregnant and lactating
  • Keloid constitution
  • Those with cancer, diabetes, epilepsy, or blood coagulation disorders
  • Those with photosensitivity (sunlight allergy)
  • Those whose skin is extremely vulnerable to external stimuli

How to choose a medical institution that can be convinced by hair loss

Thermal storage hair removal is said to be less painful than shot hair removal, but it is not completely painless. It is said that the pain of the treatment varies from person to person and also depends on the experience of the practitioner. If you are worried about the pain, you should consider whether to have the procedure after the test irradiation.

Medical hair removal includes laser shot type and heat storage type hair removal, as well as photoepilation and needle hair removal.

The effect of photoepilation is temporary hair loss that weakens the function of hair matrix cells, and tends to cause less pain during the procedure. Needle hair removal does not react with the melanin pigment of the hair, but it damages each hair root by inserting a needle into the pore and applying electricity, so it is possible to remove white hair without melanin and hair growth.

If you want to discuss the advantages and disadvantages of each hair removal method and the hair removal method that suits you, such as whether you want a less painful treatment or whether you want to remove hair including thin pigmented hair and fine hair, you can use multiple hair removal methods. It is a good idea to choose a medical institution that can perform the procedure.

It is also possible to switch from photo-epilation and shot-type hair removal to heat-storage-type hair removal. Please tell your doctor what treatments you have received during counseling and discuss the number of treatments.

Soprano Ice Soprano Ice Platinum is an unapproved medical device from the Ministry of Health, Labor and Welfare.
Drug acquisition route: The acquisition route is individual import from the manufacturer by the doctor of each medical institution.
Drugs to be aware of when importing personally (Ministry of Health, Labor and Welfare page)
Approval in Japan: No medical device has been approved in Japan because it has the same performance and function as soprano ice and soprano ice platinum.
Information on safety in other countries: Soprano Ice Soprano Ice Platinum has obtained the following approval from the US FDA. [* 1]
Approval date Approved indications
2018.01.09 Laser surgical instruments for use in general and plastic surgery and dermatology

[* 1] FDA

Mediostar NeXT PRO / NeXT PRO ALEX / NeXT PRO XL

Approval in Japan Certification acquisition: 23000BZX00140000
Manufacturer: Medical U & A Co., Ltd. Manufacturer: Ace Crepion Laser Technologies
FDA (US Food and Drug Administration) Approval K192483: FDA
Motors AX is an unapproved medical device of the Ministry of Health, Labor and Welfare.
Drug acquisition route: The acquisition route is individual import from the manufacturer by the doctor of each medical institution.
Drugs to be aware of when importing personally (Ministry of Health, Labor and Welfare page)
Approval in Japan: There is no medical device that has the same performance and operation as Motors AX and has been approved in Japan.
Information on safety in other countries: Motors AX has obtained the following approval from the US FDA. [* 2]
Approval date Approved indications
2017.06.19 Laser surgical instruments for use in general and plastic surgery and dermatology

[* 2] FDA

Seiko Medical Beauty Clinic Medical Hair Removal

We interviewed Dr. Seiko Soyama, who supervised the article, about medical hair removal.

KIREI
How long does it take to combine the medical examination (counseling) and the treatment?
Seiko Soyama
The time required for the first counseling / examination is about 30 to 60 minutes, and the actual treatment will be done at a later date if a separate reservation is made. The treatment time varies depending on the part, but the heat storage type hair removal takes about 10 to 40 minutes for the arms and legs, and it can irradiate faster than the shot type hair removal.
KIREI
Please tell me about the precautions and downtime for heat storage type hair removal.
Seiko Soyama
Redness and tingling may occur at the irradiated area, but it will subside within hours to days after surgery. Thermal storage hair removal is suitable for a wide range of skin and hair types, but if the treatment area is excessively sunburned, the treatment may be postponed due to the risk of burns.
KIREI
How painful is the procedure? Do you anesthetize?
Seiko Soyama
In the heat storage type hair removal treatment, a machine (soprano ice) that can cool at the same time as irradiating the laser is used. I don't feel any pain, so basically I don't anesthetize.
KIREI
How long does it take for the hair to come off after receiving the treatment?
Seiko Soyama
Hair begins to fall out about 2 to 4 weeks after the first laser irradiation. There are individual differences in hair removal until you are fully satisfied, but there are some who have almost no hair around the 8th time.
KIREI
Please give a message to those who are wondering whether to undergo heat storage type hair removal.
Seiko Soyama
Hair loss is a medical practice.
Get safe and effective medical hair removal at a reliable medical institution.
KIREI
Thank you, Professor Soyama!

Seiko Medical Beauty Clinic Medical Hair Removal Fees

Seiko Medical Beauty Clinic offers a custom-made hair removal course for each treatment site.

Main course (female fee) 5 times course price
Whole body hair loss From 223,241 yen
Arm (upper arm + forearm) set 91,344 yen
Foot (thigh + both knees + lower leg) set 143,649 yen
Both sides 17,325 yen
VIO (V line I line top and bottom O line) set 121,281 yen

Seiko Medical Beauty Clinic Treatment Flow

(1) Counseling / medical examination

After completing the questionnaire, we will ask you about the part to be depilated, your worries about hair, and the desired finish. After counseling, the doctor will examine the condition of the skin and hair, and receive explanations on the hair cycle, machine, and precautions and risks related to the procedure.

Since you will actually receive the treatment at a later date, make a reservation for the treatment date. If you are a minor and undergo hair loss, you must be accompanied by a guardian and consent to the procedure at the time of examination.

(2) If you are using body cream, wipe it off.

Some skin care products, such as body creams and sunscreens, react to the laser and cause burns or make it difficult to remove hair, so wipe them off before undergoing the procedure. If you wish to have your face removed, remove your makeup and wash your face before the procedure.

(3) Marking, photography, initial irradiation

Wear goggles to protect your eyes from the laser, and mark and photograph the hair loss area. A cooling gel is applied to protect the skin and make it slippery, and the first laser irradiation is performed to check the skin for abnormalities and severe pain. It is said that you will not feel any pain, but if the pain caused by laser irradiation is strong, use anesthesia.

(4) Treatment

Slide the handpiece of the hair removal machine on the skin in an arc and irradiate the laser so that the heat is stored evenly. Pain varies from person to person depending on the site and amount of hair, but in most cases it is said that the irradiated surface feels warm. In addition, from the second time onward, the treatment will be performed according to the hair cycle of the part to be depilated.

(5) Cooling / end

The procedure takes about 90 minutes for whole body hair removal and about 20 to 40 minutes for each part. After irradiating the laser, the cooling gel is wiped off and the treatment is completed. Cooling and ointments are prescribed depending on the condition of the skin.

Introduction of supervising doctor

Dr. Seiko Soyama, the director of Seiko Medical Beauty Clinic. He is a director of the Japanese Society for Medical Hair Removal and has a wealth of lectures on medical hair removal. As a beauty specialist, he has appeared in many media and contributed to "Latest Cosmetology and Dermatology Medical Navigation" and "Non-Surgical Cosmetology Super Practical Course". In addition, the clinic has a policy of detailed examination, such as a completely private treatment room, as well as a kids room and a men-only room.

Medical institution with Dr. Seiko Soyama

Seiko Medical Beauty Clinic Seiko Medical Beauty Clinic
Seiko Medical Beauty Clinic Fukuoka-in
Inquiries to Kagoshima-in: 0120-172-117
Inquiries about Fukuoka-in: 0120-126-265

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