Melasma is a stubborn, often symmetrical darkening of the skin, most commonly on the cheeks, forehead, upper lip, and chin. It results from increased melanin production driven by hormones, sun exposure, and genetic predisposition.
The condition is significantly more common in women, who make up approximately 90% of cases. It frequently appears during reproductive years, often triggered by hormonal fluctuations from pregnancy, birth control pills, or hormone replacement therapy (HRT).
How Does the Melasma Laser Treatment Work?
Melasma lasers work by delivering energy that selectively targets pigment (melanin) or by creating controlled skin injury to prompt remodelling. The aim with melasma is to reduce visible pigmentation while minimising inflammation.
What Are the Common Melasma Laser Treatment Types?
Several laser and light methods might help address melasma. Choice depends on the following:
- Melasma type (epidermal vs dermal)
- Patient’s skin phototype
- History of PIH
- Whether topical maintenance is possible
The main melasma laser treatment options:
- Low-fluence Q-switched lasers (often called “laser toning”)
- Non-ablative fractional lasers
- Picosecond lasers
- Intense Pulsed Light (IPL)
Note: Lasers should usually be reserved for recalcitrant cases and used with adjuvant topical therapy and strict sun protection.
1. Low-Fluence Q-Switched (Laser Toning)
Laser toning uses a Q-switched Nd:YAG laser at 1,064 nm with low energy applied in multiple passes over the treatment area. The goal is to gently break up pigment without causing noticeable burns or surface damage. Sessions are usually done weekly or every 2–4 weeks.
This method is popular because it can lighten melasma with relatively low risk of immediate skin damage. For some patients, especially those with epidermal or mixed melasma, it can give visible improvement when combined with topical creams. It’s a conservative approach that prioritises minimal downtime.
A typical course involves multiple sessions (usually 4–10) with gradual improvement.
2. Non-Ablative Fractional Lasers
Non-ablative fractional lasers (for example, 1,550 nm erbium-glass or 1,927 nm thulium) create tiny columns of thermal injury in the dermis while leaving the top layer of skin mostly intact. These micro-injuries stimulate collagen remodelling and can help disperse pigment.
Fractional lasers can be a good option when deeper pigment is present and when the clinician has experience treating darker skin types.
3. Picosecond Lasers
Picosecond lasers use incredibly fast pulses that break pigment into very small pieces, reducing heat exposure to nearby skin. They were originally developed for tattoo removal and pigmentary conditions, aiming to reduce heat-related inflammation.
4. Intense Pulsed Light (IPL)
Intense Pulsed Light (IPL) is not a laser but a broad-spectrum light device that targets pigment and blood vessels. Different filters allow clinicians to adjust for the depth and type of pigmentation. For melasma, IPL can help lighten superficial pigment in selected patients.
What Are the Benefits?
- Melasma that does not respond adequately to topical agents alone may improve with carefully delivered laser energy.
- Compared with topical treatment alone, lasers may produce quicker visible changes, particularly for epidermal pigment.
- Dermal or mixed melasma can be difficult to treat with creams alone. Fractional and certain pigment-targeting lasers may help address deeper components.
What Are the Key Considerations?
Combination Is Best
Lasers may work best when clinicians use them alongside:
- Topical depigmenting agents (for example, hydroquinone or tranexamic acid)
- Retinoids to support skin turnover
- Strict, daily broad-spectrum SPF 50+ sunscreen
- Physical sun avoidance measures (hats, shade)
This layered strategy reduces inflammation, suppresses new pigment production, and improves the durability of results.
Number of Sessions
Melasma rarely improves after a single treatment. Most protocols involve between three and ten sessions, spaced several weeks apart. Some regimens use weekly low-fluence laser toning at the beginning, followed by longer intervals. Even after the initial course, maintenance sessions every six to twelve months are often necessary.
Risk of Post-Inflammatory Hyperpigmentation (PIH)
PIH is one of the risks often associated with melasma laser treatment. It occurs when inflammation stimulates additional melanin production, leading to darker patches after treatment. Individuals with Fitzpatrick skin types IV–VI face a higher risk. For these patients, conservative settings and test patches are essential.
Maintenance and Sun Protection
Sun exposure is one of the strongest triggers for melasma. Ultraviolet (UV) and visible light both contribute to pigmentation. Patients must follow strict sun protection before, during, and after laser therapy. Without rigorous protection, results fade quickly, and recurrence is likely.
