Laser Toning White Spots: Do They Ever Fade?

If small white dots keep appearing on your cheeks or chin while you're getting laser toning, pause the toning and have them checked. Pale spots have been reported after many low-energy toning sessions spaced close together, and in some cases they grew in number and size as treatment continued. Once they appear, they can take years to fade, so catching them early matters.

Are These White Spots Actually From Laser Toning?

Are These White Spots Actually From Laser Toning?

Start with when and where they showed up. If tiny white dots are scattered over melasma-darkened skin, only inside the area you had toned, and they increased while you were still getting treatments, toning-related hypopigmentation is the first thing to consider.

Hypopigmentation: flat spots that look lighter than the surrounding skin because there's less melanin, the pigment that gives skin its color. Papers also call it mottled hypopigmentation or punctate leukoderma.

Doctors at a national skin referral center in Singapore described three women who developed these spots after 1064nm laser toning for melasma or skin rejuvenation. One had 40 to 50 sessions over 6 months, going from weekly to several times a day. She noticed spots 2 to 3 months in, and they spread and merged into larger patches on her cheeks as the sessions got more frequent. The other two had weekly toning for a year, or treatments about every two weeks for 2 years, before spots appeared on their cheeks and chin. None had a history of vitiligo or an earlier rash, and the spots didn't itch or hurt.

If you also have white spots on the backs of your hands, your arms, or around your eyes, another cause may be involved. Idiopathic guttate hypomelanosis is common in older skin. It's harmless, but it doesn't regain color on its own. Vitiligo can show up where skin has been injured, burned, or rubbed, so a new white spot on the face isn't enough by itself to name the cause.

Why Does Repeated Toning Leave White Spots?

Why Does Repeated Toning Leave White Spots?

Laser toning uses a 1064nm Q-switched laser at low energy with a wide beam, repeated over many sessions close together. Each pass is gentle, but the energy adds up, and the cells that make pigment can stop working the way they should.

Melanocytes: cells at the bottom of the skin's surface layer that make melanin and pass it to the skin cells around them.

Why Does Repeated Toning Leave White Spots?

Two Korean university hospitals biopsied the skin of two women with white spots after toning. The white areas had almost no melanin, yet the number of melanocytes was about the same as in the normal skin right next to them. The cells had survived but weren't producing mature pigment. In one of the Singapore patients, though, the number of melanocytes in the white spots had actually dropped, so the damage may differ from person to person.

How Many Sessions, and How Close Together?

How Many Sessions, and How Close Together?

There's no set number of sessions at which spots appear. A 2022 review of 42 studies on toning for melasma concluded that how often white spots occur isn't known, and more studies reported none than reported them. That said, some reports from East Asian melasma patients put the risk at around 10%.

How Many Sessions, and How Close Together?

Among 177 people who had toning for melasma, 21 (11.9%) developed white spots within 10 sessions. In Egypt, 30 people had toning on one side of the face every two weeks for 9 sessions, and 4 (13%) developed spots on that side. Relatively high energy, short intervals, and too many total sessions are the recognized risk factors, and the spots were more frequent in darker skin.

The Singapore team suggested keeping toning to no more than once every two weeks and capping the total number of sessions. Picosecond lasers aren't exempt, either. In one clinic's records of 796 melasma patients treated every 4 to 12 weeks, 3 (0.38%) developed white spots.

You've Noticed White Spots. Now What?

You've Noticed White Spots. Now What?

Stop the toning as soon as you see them. Spots grew in number and size in patients who kept going, and the review of toning studies also advises stopping as soon as possible once spots appear.

Recovery after stopping varies from report to report. Some doctors observed spots lasting 2 to 3 years or more, with fewer than 10% clearing on their own after 2 years of follow-up. Others estimated from their clinical experience that half cleared by 2 years and 80% by 3 to 4 years. Neither figure came from a statistical analysis, so treat them as rough reference points, not a timeline for your skin. Everyone's skin is different.

Treatment aims to reduce the contrast between the white spots and the melasma around them:

1. Topical medication: one Singapore patient applied tacrolimus ointment to the white spots and a lightening cream to the surrounding melasma, plus sunscreen, and showed visible improvement after 2 years. The other two used the same ointment with little or no change.
2. Narrowband UVB phototherapy: this aims to wake melanocytes up so they make pigment again, and it's been used with some success.
3. 308nm excimer laser: in one case, twice-weekly sessions for 7 months brought the color fully back. Keep in mind that spot came from a 532nm laser used on the neck, not from 1064nm toning.

Tacrolimus: a non-steroid prescription ointment that calms the immune response. It's also used for pigment conditions like vitiligo.

When Should You Get the Spots Checked Again?

When Should You Get the Spots Checked Again?

After you stop toning, keep an eye on whether the spots stay the same in number and size by taking photos in the same light. The changes below may point to something other than toning-related spots, so get them checked rather than waiting for your next appointment:

• Spots keep spreading or getting bigger months after you stopped toning
• White patches appear in places you never had toned, like the backs of your hands, arms, mouth, or eyes
• The edge of a white patch turns red, raised, or itchy
• Eyebrow hairs or lashes over a white area turn white

These changes overlap with how vitiligo can look, so a doctor will want to see the skin and hair beyond your face too.

Planning Around a Trip to Seoul

If you're visiting Seoul to have these spots looked at or treated, flying isn't a reason to postpone treatment, unless you had sedation that day. On a single visit, most treatments bring gradual change rather than a dramatic one. Treatments for white spots, like the twice-weekly excimer sessions in the case above, often run for months, so one visit won't replace a full course.

After you're home, you can send photos through the clinic's WhatsApp if you have questions about how the spots are changing. If you notice a serious warning sign, like white patches spreading quickly to new areas, see a local doctor first.

What to Note Before Your Consultation

Write down four things before you come in: the month you started toning, your usual interval, your total number of sessions so far, and when you first noticed the spots. Those details line up directly with the known risk factors. If you have a photo from around the time the spots first appeared, compare it with one taken now in the same light. STON Clinic is in Seoul's Myeongdong, inside Lotte Hotel Seoul near Euljiro 1-ga Station. When you message us on WhatsApp, include those four details and front and side photos of your cheeks and chin.