Laser Hair Removal Effects and Treatment Intervals: How Many Sessions Are Needed and When Should You Shave Before Treatment?｜Hongdae Hair Removal

Laser Hair Removal Key Summary

Laser hair removal is a treatment that delivers laser energy to the melanin pigment in the hair to damage the hair follicles and reduce the amount and thickness of hair that regrows over the long term.

Because the laser works most effectively on hair that is currently in the growth phase, it is not possible to remove all hair with a single treatment. Generally, at least 5 repeated treatments at intervals of 4–8 weeks are commonly used.

In addition, women commonly receive hair removal for the underarms, upper lip, arms, legs, bikini line, and Brazilian area, while men often target thick and dense hair on areas such as the beard, chin, neck, chest, abdomen, and legs, so the number of treatments needed and the level of perceived pain may vary depending on the area and hair thickness.

What Is Laser Hair Removal?

One-Line Answer

Laser hair removal is a treatment that targets the melanin pigment in the hair with laser energy to damage the hair follicles and reduce the amount and thickness of hair that regrows over the long term.

Hair contains a pigment called melanin.

Laser hair removal allows this melanin to absorb laser energy at a specific wavelength and then transfers the resulting heat to the hair follicle.

During this process, the structures involved in hair production are damaged, reducing the hair's ability to grow afterward.

Therefore, dark and thick hair tends to absorb laser energy well, while white or gray hair with little to no melanin may respond less effectively to laser hair removal.

However, it is not accurate to understand laser hair removal as “a treatment that permanently removes every single hair after one session”.

Permanent hair reduction, as defined by medical device standards, refers to a stable long-term reduction in the number of hairs that regrow after completing treatment.

CHECK POINT

Dark and thick hair → Tends to respond well to laser treatment

Fine hair → May require more repeated treatments

White or gray hair → May have a lower response to laser treatment

Why Is Laser Hair Removal Not Completed in One Session?

One-Line Answer

Laser hair removal works most effectively on hair in the growth phase, so hairs in different growth cycles must be treated repeatedly.

Hair does not continuously grow in the same state.

The hair growth cycle is broadly divided into the growth phase, regression phase, and resting phase.

During the growth phase, the hair and hair follicle are connected, allowing laser energy to be effectively delivered to the follicle.

In contrast, hairs in the regression or resting phase do not respond to the same extent, so additional treatments are needed when they later enter the growth phase again.

For this reason, repeated treatments at intervals of 4–8 weeks for at least 5 sessions are commonly used.

CHECK POINT

The reason laser hair removal requires multiple sessions = Not all hairs are in the growth phase at the same time.

How Many Laser Hair Removal Sessions Are Needed to See Results?

One-Line Answer

Generally, a reduction in the amount and thickness of hair can be observed after at least 5 sessions, while areas with thick and dense hair, such as the beard, may require more sessions.

The number of hair removal sessions is not the same for every area.

Areas where the hair is thick, dense, or grows quickly may require more repeated treatments.

For example, areas such as women's underarms or legs, which tend to respond relatively well, often show a rapid reduction in hair after repeated treatments.

In contrast, men's beard hair is very thick and dense with strong growth, so 5 sessions may not provide sufficient reduction, and more than 10 sessions are often performed.

Therefore, the number of sessions can be simply summarized as follows.

• Goal of mild hair reduction → Changes can be observed from approximately 5 sessions

• Want to sufficiently reduce the amount of hair → Consider 5–10 or more sessions

• Areas with thick and dense hair such as men's beard → May require more than 10 sessions

What is important is not simply completing a certain number of sessions, but repeating treatments at consistent intervals according to the hair growth cycle.

How Many Weeks Apart Should Laser Hair Removal Treatments Be?

One-Line Answer

Laser hair removal is usually performed at intervals of 4–8 weeks. Areas with faster hair growth cycles, such as the face, may be treated at relatively shorter intervals, while areas with longer growth cycles, such as the arms and legs, may be treated at longer intervals.

Because the rate at which hair regrows differs depending on the area, hair removal intervals may also vary.

Facial and beard hair grows relatively quickly, while hair on the arms and legs tends to have a longer growth cycle.

Therefore, rather than repeating treatment at exactly the same interval for every area, it is effective to match the treatment timing to the growth cycle when the hair begins to regrow.

As a general guideline, intervals of approximately 4–8 weeks are most commonly used.

When Should You Shave Before Laser Hair Removal?

One-Line Answer

You should shave one day before laser hair removal and avoid methods that remove the hair from the root, such as waxing or tweezing.

Laser hair removal uses the melanin in the hair to deliver energy to the hair follicle.

Therefore, if the hair is removed from the root by waxing or tweezing, there is no hair for the laser to target, which may reduce the effectiveness of hair removal.

Conversely, if the hair is left too long, the laser energy may first be absorbed by the hair above the skin surface, increasing the sensation of heat or the risk of burns.

Therefore, the most appropriate preparation is to shave lightly the day before treatment.

CHECK POINT

Shaving → Allowed

Waxing → Avoid

Tweezing → Avoid

Hair removal cream → Avoid using immediately before treatment due to the possibility of skin irritation

Visiting with long, unshaved hair → Avoid

Which Areas Are Commonly Treated With Female Laser Hair Removal?

One-Line Answer

Common areas for female laser hair removal include the upper lip, face, underarms, arms, legs, bikini line, and Brazilian area.

Laser hair removal can be applied to various areas from the face to the body.

On the face, it can be used on areas including the upper lip, forehead, hairline, glabella, cheeks, sideburns, jawline, and neck.

On the body, hair removal can be performed on areas including the underarms, arms, backs of the hands and fingers, chest, abdomen, back, waist, thighs, calves, tops of the feet, bikini line, and Brazilian area.

In particular, female facial hair removal can not only reduce hair but may also help the skin surface appear smoother as fine facial hair decreases and reduce the appearance of makeup lifting.

Common Female Hair Removal Areas

• Upper lip · fine facial hair → Makeup and skin texture management

• Underarms → Reduced burden of repeated shaving

• Arms · legs → Body hair removal

• Bikini line · Brazilian → Reduced burden of repeated shaving and waxing

Which Areas Are Commonly Treated With Male Laser Hair Removal?

One-Line Answer

Male hair removal most commonly includes beard removal on areas such as the upper lip, chin, sideburns, and neck, and is also widely used to reduce thick body hair on areas such as the chest, abdomen, arms, and legs.

Men often have thicker and denser hair than women.

Beard hair in particular requires daily shaving, and repeated skin irritation, redness around the chin, and folliculitis after shaving can easily occur, making it an area with high demand for laser hair removal.

Beard hair removal can be divided into the following areas.

• Upper lip

• Tip of the chin

• Jawline

• Both cheeks

• Sideburns

• Neck

• Full face beard

As beard hair decreases, not only can the time spent shaving every day be reduced, but skin irritation caused by repeated shaving may also decrease.

Why Does Male Beard Hair Removal Require More Sessions Than Other Areas?

One-Line Answer

Male beard hair is thick and dense with strong growth, so it often requires more repeated treatments than other areas.

Beard hair contains a large amount of thick, dark hair that absorbs laser energy well, so the initial response itself tends to be good.

However, because the hair density is high and the follicles have strong growth activity, new hairs entering the growth phase may continue to appear even after several treatments.

The upper lip and tip of the chin in particular are among the areas with the highest beard density, so they often take relatively longer to treat.

Therefore, it is more accurate to understand male beard hair removal as gradually reducing hair density and thickness through repeated treatments rather than “completely finishing after a certain number of sessions.”

Does Laser Hair Removal Permanently Stop Hair From Growing?

One-Line Answer

Rather than meaning that not a single hair will ever grow again, laser hair removal is more accurately understood as a treatment that significantly reduces the number and thickness of hairs that regrow over the long term after repeated treatments.

After laser hair removal, you can expect the hair to grow more slowly, become finer, and decrease in overall amount compared with before.

Permanent hair reduction as defined by FDA medical device standards also refers to a long-term reduction in the number of hairs that regrow at 6, 9, and 12 months after treatment completion.

In other words,

Permanent hair removal = Zero hair for life

rather than interpreting it this way,

it is more accurate to understand it as achieving a long-term and stable reduction in hair regrowth through repeated treatments

.

Does Laser Hair Removal Make the Skin Brighter?

One-Line Answer

Laser hair removal itself is not a whitening treatment, but as dark hair and shaving shadows decrease, the skin may appear relatively brighter and smoother.

Especially in areas such as the underarms or male beard area, dark hair beneath the skin can show through, making the area appear darker than the actual skin tone.

As the amount of hair decreases through laser hair removal, this beard shadow or dark appearance may be reduced.

In addition, reducing repeated shaving and friction may decrease skin irritation, making the skin appear cleaner overall.

However, treating existing pigmentation itself is a separate issue from hair removal.

CHECK POINT

If the area looks dark because of hair → It may appear brighter after hair removal

If actual pigmentation is present → Consider separate pigmentation treatment

Does Facial Laser Hair Removal Help Makeup Apply Better?

One-Line Answer

If you have a lot of fine facial hair, reducing it through laser hair removal can make the skin surface smoother and help base makeup appear more even.

Fine facial hair can create subtle unevenness on the skin surface.

Especially when there is a lot of fine hair around the cheeks, upper lip, and sideburns, foundation or cushion products may catch on the hair, causing makeup to lift or making the skin texture appear rough.

Reducing fine hair does not change the skin itself, but it can help makeup adhere more evenly to the skin surface.

Therefore, female facial hair removal is used not only for the upper lip but also for managing fine hair across the entire face, including the forehead, hairline, cheeks, sideburns, and jawline.

How Painful Is Laser Hair Removal?

One-Line Answer

Laser hair removal may cause a stinging or momentary hot sensation, and pain may feel stronger in areas where the hair is thicker and denser.

The laser concentrates thermal energy on the melanin in the hair.

Therefore, areas with dense, dark, and thick hair absorb more energy and may experience relatively stronger stimulation.

Areas with a lot of thick hair, such as the male upper lip and chin or the Brazilian area, may feel relatively more painful.

In contrast, areas where the hair is less dense or finer tend to be relatively more comfortable.

Apogee Elite Plus uses air cooling together with laser irradiation to reduce heat on the skin surface and can use two wavelengths, 755nm and 1064nm.

What Kind of Hair Removal Laser Is Apogee Elite Plus?

One-Line Answer

Apogee Elite Plus is a laser device that uses two wavelengths, 755nm Alexandrite and 1064nm Nd:YAG, to treat hair of various thicknesses and areas from the face to the body.

For hair removal lasers, using a wavelength and energy level appropriate for the hair thickness and skin characteristics is more important than simply using high output.

Apogee Elite Plus can use two wavelengths, 755nm and 1064nm, and delivers laser energy using a non-contact method without placing the handpiece directly against the skin.

It can also use a spot size of up to 24mm, allowing relatively rapid treatment of large areas such as the arms and legs.

Main Features

• 755nm + 1064nm dual wavelengths

• Non-contact method

• Air cooling system

• Applicable to various areas from the face and beard to the arms, legs, and Brazilian area

• Large spot size for rapid treatment of broad areas

Can You Receive Laser Hair Removal If You Have Dark Skin?

One-Line Answer

Laser hair removal is possible even with dark skin, but because laser energy can also be absorbed by melanin in the skin, selecting the appropriate wavelength and energy settings is important.

Laser hair removal targets melanin in the hair.

However, because the skin also contains melanin, laser energy may also be absorbed by the skin if the skin is dark or has recently been tanned.

In these cases, the sensation of heat may become stronger and the risk of burns or pigmentation may increase.

Therefore, if you are planning laser hair removal, it is best to avoid strong tanning.

In addition, the 1064nm wavelength has relatively lower absorption by skin melanin and is widely used in hair removal devices for various skin tones.

What Is the Difference Between Brazilian Laser Hair Removal and Waxing?

One-Line Answer

Waxing is a temporary method that removes currently grown hair from the root, while laser hair removal damages the hair follicles through repeated treatments to reduce hair regrowth itself over the long term.

Waxing removes hair immediately after treatment and provides rapid results, but the hair grows back over time.

Laser hair removal does not remove all hair in one session, but gradually reduces the amount and thickness of hair by repeatedly treating hairs in the growth phase.

Therefore, laser hair removal may be more suitable if long-term repeated hair removal maintenance feels burdensome.

Also, you should not wax between sessions while undergoing laser hair removal. This is because removing hair from the root eliminates the target needed to deliver energy during the next laser treatment.

Can Folliculitis Occur After Laser Hair Removal?

One-Line Answer

The area around the hair follicles may temporarily become red or bumpy after laser hair removal, and in most cases, this settles within a short period of time.

Because laser energy delivers heat to the hair follicles, temporary redness or a sensation of heat may appear around the follicles immediately after treatment.

The skin barrier may also become temporarily sensitive after hair removal, so it is best to avoid strong friction, hot baths, saunas, and similar activities.

In addition, sufficient moisturization and sun protection can help prevent skin irritation and pigmentation.

If severe inflammatory folliculitis or dermatitis is already present in the treatment area, reducing the inflammation first should be prioritized.

What Are the Precautions After Laser Hair Removal?

One-Line Answer

After laser hair removal, it is important to reduce heat and irritation to the skin and use sufficient moisturizer and sun protection.

Temporary heat and redness may appear on the skin immediately after treatment.

Therefore, it is best not to rub or irritate the skin on the day of treatment.

CHECK POINT

• Apply sufficient moisturizer to the treated area

• Use sunscreen when going outdoors

• Avoid saunas, steam rooms, and hot baths for several days

• Avoid strong scrubs or exfoliation

• Do not tweeze or wax hair even if it begins to grow

• Stop using irritating products if the skin becomes severely red or develops blisters

What Is the Most Important Difference Between Female and Male Hair Removal?

One-Line Answer

The laser principle is the same, but men often have thick and dense beard and body hair that may require higher energy and more repeated sessions, while women often receive detailed hair removal across various areas such as fine facial hair, underarms, arms, legs, and the Brazilian area.

Female and male hair removal do not need to be considered separate treatments.

Both use the same principle of targeting melanin in the hair and delivering thermal energy to the hair follicle.

The differences lie in the characteristics of the hair and the treatment areas.

Female Hair Removal

Upper lip · fine facial hair · underarms · arms · legs · bikini line · Brazilian

Male Hair Removal

Upper lip · chin · neck · sideburns · full face beard · chest · abdomen · arms · legs

Male beard hair in particular has deep follicles and is thick and dense, making it a representative area where the pain and number of sessions required for laser hair removal are relatively higher.

What Is Most Important for Improving Laser Hair Removal Results?

One-Line Answer

To improve laser hair removal results, it is most important to repeat treatments according to the hair growth cycle and avoid waxing or tweezing during the treatment period.

Laser hair removal is not simply a treatment in which a powerful laser is applied once.

It is a process of gradually reducing hair density and thickness by repeatedly treating hairs as they enter the growth phase.

Therefore, the key factors that determine the results are as follows.

FINAL ANSWER

• Laser hair removal interval → Usually 4–8 weeks

• Number of laser hair removal sessions → At least 5 repeated sessions

• Thick and dense hair such as beard hair → May require more sessions

• Before treatment → Shave one day before

• Waxing · tweezing → Avoid

• During the treatment period → Avoid strong tanning

• After treatment → Moisturizer + sun protection

Laser hair removal can be used not only by those who want to reduce the burden of repeated shaving or waxing, but also by those who want to reduce unwanted hair in specific areas over the long term, including beard shadow, fine facial hair, underarms, arms, legs, and the Brazilian area.

Frequently Asked Questions About Laser Hair Removal (FAQ)

Do I Have to Shave the Day Before Laser Hair Removal?

Yes. Generally, it is best to shave one day before treatment. Leaving the hair too long may generate heat on the skin surface, while removing the hair from the root through methods such as waxing can make it difficult for the laser to deliver energy to the hair follicle.

Should I Avoid Waxing Before Laser Hair Removal?

Yes. It should be avoided. Because the laser delivers energy to the hair follicle through the melanin in the hair, removing the hair from the root may reduce the effectiveness of hair removal.

After How Many Laser Hair Removal Sessions Can I See Results?

Over several treatments, you can observe changes such as slower hair growth and reductions in the amount and thickness of hair, and generally at least 5 repeated sessions are used.

How Many Beard Hair Removal Sessions Are Needed?

Male beard hair is thick and dense, so it tends to require more repeated sessions than other areas, and more than 10 sessions may be needed if sufficient reduction is the goal.

How Many Underarm Laser Hair Removal Sessions Are Needed?

Generally, at least 5 repeated sessions are commonly used while observing changes in the amount and thickness of hair.

Can Upper Lip Hair Become Thicker After Laser Hair Removal?

In most cases, repeated treatments cause the hair to become finer and decrease. However, paradoxical hypertrichosis, in which surrounding hair increases after laser or light treatment, has rarely been reported in some areas of the face and neck, so repeatedly treating with excessively low energy requires caution.

Can White Beard Hair or Gray Hair Be Removed With Laser Hair Removal?

The effects are limited. Because laser hair removal targets melanin in the hair, it is difficult to deliver energy to white hair with little to no melanin.

Can I Shave Immediately After Laser Hair Removal?

If the skin is red or stinging, it is better to wait until the skin has calmed before shaving gently rather than shaving immediately.

Does Brazilian Laser Hair Removal Also Require Multiple Sessions?

Yes. Hair in the Brazilian area also responds effectively to the laser only when it is in the growth phase, so repeated treatments are necessary.

Are Laser Hair Removal Methods Different for Men and Women?

The basic principle is the same, but because hair thickness, density, and commonly treated areas differ, there may be differences in the energy required and the number of repeated sessions.

Can I Receive Laser Hair Removal in Summer?

Yes. However, strong tanning and UV exposure before and after treatment may increase the risk of burns or pigmentation, so thorough sun protection is important.