How Many Pico Toning Sessions Are Needed for Melasma, Spots, and Lentigines?

Hello. I’m Jowonjin, the chief director of Chai Clinic, where I have been treating skin in Hongdae for 10 years.

I had pico toning before, and my melasma

got darkerㅠㅠ

I’ve been getting treatment for half a year, but there’s no effect.

Maybe it just doesn’t suit me?

When consulting about pico toning, there are many people who have already had the procedure several times,

but come in because they do not feel any effect.

The number of sessions needed differs by type of pigmentation, and if you start without knowing this,

you may not get the pico toning results you expected, or you may end up spending more time and money.

Today, under the topic “How Many Pico Toning Sessions Are Needed for Melasma, Spots, and Lentigines?”

I’ll explain the recommended number of treatments by pigmentation type and why,

the factors that affect the number of sessions, and how to care for your skin to maximize pico toning results.

Key Summary of Pico Toning Results

• Average recommended sessions by pigmentation type: melasma 5–10+ sessions / spots 3–5 sessions / lentigines 1–3 sessions

• Even for the same pigmentation, the number of sessions needed varies depending on pigment depth, skin type, and sun exposure

• After pico toning: sun protection and home care

Table of Contents

• What is pico toning? How it works

• Pico toning results: why doesn’t it end in one session?

• How many pico toning sessions are needed for melasma?

• How many pico toning sessions are needed for spots?

• How many pico toning sessions are needed for lentigines?

• Four factors that affect the number of sessions

• How to maximize pico toning results

• What matters more than the number of sessions is diagnosing your own skin

What is pico toning? How it works

Pico toning is a procedure that uses laser pulses in the picosecond range (one-trillionth of a second)

to break down melanin pigment in the skin into very small particles.

When the pigment is broken into tiny pieces, our body’s macrophages

naturally absorb and remove it, which helps the skin tone become clearer and spots fade.

Its biggest advantage is that, compared with conventional laser toning, the pulse duration is shorter, so thermal damage is reduced while pigment destruction is stronger.

That is why it is widely used for a variety of pigmentation concerns such as melasma, spots, and lentigines, with a short downtime.

The device shown above is PicoSure, the machine used for pico toning.

Pico toning results: why doesn’t it end in one session?

Pigmentation is not removed all at once,

but gradually fades through a cycle of treatment → pigment breakdown → elimination → regeneration.

The number of sessions needed also varies depending on the depth and amount of pigment.

• Superficial pigment (near the skin surface): fades quickly with fewer sessions

• Deep dermal pigment: needs to be broken down gradually over multiple sessions

• Hormone- or UV-related pigment: may recur, so maintenance is needed

For these reasons, the recommended number of sessions differs for melasma, spots, and lentigines.

How many pico toning sessions are needed for melasma?

Recommended number: usually 5–10 sessions, at 2–4 week intervals

Melasma is one of the more difficult pigmentation conditions to treat.

This is because the pigment is located across both the epidermis and dermis,

and it tends to recur frequently due to various causes such as female hormones, UV exposure, and stress.

To see proper pico toning results, at least 5 consistent sessions are needed,

and dermal-type melasma or mixed-type melasma may require more than 10 sessions.

The usual interval between sessions is 2–4 weeks, and it is important not to skip sessions and to keep them regular.

Melasma does not end with treatment alone; lifestyle care affects the results.

Sun protection, home care, and management of hormonal changes must all be combined to maintain a faded result without recurrence.

How many pico toning sessions are needed for spots?

Recommended number: usually 3–5 sessions, at 3–4 week intervals

Because spots are usually pigment located in the epidermis, they tend to respond faster than melasma.

Freckles, light pigmentation, and small sun-induced spots can show noticeable improvement in about 3–5 sessions.

After treatment, the pigment may temporarily look darker and then fade as the scab falls off.

Some people feel a satisfactory change after just 1–2 sessions,

but if the spots are widely distributed or deeper, more than 5 sessions may be needed.

How many pico toning sessions are needed for lentigines?

Recommended number: usually 1–3 sessions in spot mode; in some cases, a single session is possible

Lentigines (age spots, sun spots) have pigment that is relatively clearly clustered

and tends to have distinct borders, making them one of the pigmentation conditions that responds most quickly to laser treatment.

Rather than toning mode, treatment is done in spot mode with stronger energy.

In many cases, substantial improvement is seen after 1–3 sessions.

However, if the lentigines are dark and thick,

it may be effective to combine other pigment lasers.

Also, since scabs often form for 1–2 weeks after treatment and then fall off naturally,

it is better to schedule with some flexibility.

Q. After pico toning, my pigmentation got darker instead.

A. In most cases, this is due to two causes.

First, post-inflammatory hyperpigmentation can occur when the intensity (energy) is raised too aggressively in an attempt to remove pigment all at once. Second, the interval between treatments may have been too short, and the next session was done before the skin had fully recovered.

That is why, for the first session, I check the skin’s response with a not-too-strong setting,

and then adjust the intensity from the next session onward.

I explained these points in more detail in the post below,

so please be sure to read this before getting pico toning.

Four factors that affect the number of sessions

The number of sessions needed differs from person to person, even for the same pigmentation.

The following factors have an effect.

1. Depth and amount of pigment

The closer the pigment is to the epidermis, the fewer sessions are needed to see results.

Pigment located deeper in the dermis needs more sessions.

2. Skin type and melanin activity

The more actively melanin is produced in the skin, the easier recurrence becomes, and the more delicate adjustments to intensity and session count are needed.

3. Age and hormonal status

Pigmentation changes during middle age, and melasma after pregnancy and childbirth, may require more treatment sessions.

4. Sun exposure and lifestyle habits

If you neglect sun protection while undergoing treatment, pigmentation can become active again and the number of sessions increases.

How to maximize pico toning results

• Apply sunscreen every day and reapply every 2–3 hours: this is the most important step.

• Avoid strong exfoliation and acidic products for 1 week after treatment

• Keep the skin well moisturized: the skin barrier needs to be stable for less pigmentation to develop.

• Follow the recommended treatment interval: if it is too soon or too late, the results will be reduced.

What matters more than the number of sessions is diagnosing your own skin

For melasma, 5–10 sessions; for spots, 3–5 sessions; and for lentigines, 1–3 sessions are common general ranges,

but the actual number of sessions varies depending on pigment depth, skin condition, and lifestyle environment.

Rather than simply completing a set number of sessions, getting an accurate diagnosis of the pigmentation before treatment

and making a plan suited to your own skin is the fastest way to see pico toning results.

Thank you. This was Jowonjin.