Brown spots and melasma: which treatment category matches the pigment you have?
Pigment treatment depends first on what kind of pigment it is, because a sun spot, a melasma patch and a mark left after acne each behave differently under laser light. Picosecond and Q-switched lasers, low-energy laser toning, intense pulsed light and prescribed topical or oral agents are the categories most often discussed, and the choice between them is made after a doctor examines the skin in person.
Sorting the pigment before choosing anything
Brown discoloration is a symptom with several possible sources. Some spots sit in the outer skin and have crisp edges; others are hazy, symmetrical and influenced by hormones and heat. A few lie deeper, giving a grey or bluish tint. The category of treatment that may help one type can aggravate another, which is why an examination, sometimes with a magnifying lamp or imaging, comes before any booking.
- Solar lentigines: defined spots on sun-exposed areas, usually in the upper skin layers
- Melasma: blurry, often symmetrical patches on cheeks, forehead or upper lip that can flare with sun, heat and hormonal change
- Post-inflammatory hyperpigmentation: darkening left behind after acne, a burn or irritation
- Freckles: small, scattered spots that tend to darken in summer
- Deeper dermal pigment: greyish or bluish patches that sit lower and often respond more slowly
Categories commonly discussed for pigment
Lasers aimed at pigment work by delivering light that melanin absorbs. Q-switched nanosecond lasers and picosecond lasers (PicoSure and similar systems are familiar examples) release energy in extremely short pulses intended to fragment pigment so the body can clear it. Laser toning uses the same kind of device at low energy over the whole face and is often chosen when melasma is involved, because a gentler approach may lower the chance of irritation-driven darkening.
Intense pulsed light is a broad-spectrum flash rather than a single wavelength, and it is often considered for scattered sun spots and mixed redness. Alongside energy devices, doctors frequently prescribe topical lightening agents and sun protection, and some may consider oral medication such as tranexamic acid for melasma after reviewing medical history. Melasma in particular is usually treated as something to manage over time rather than something a single procedure resolves.
The device is not the treatment: settings decide the outcome
Two clinics can own the identical picosecond laser and run very different procedures with it. The wavelength selected, the spot size, the energy level, how many passes are made and how far apart visits are spaced all belong to the doctor's technique, not to the machine. For a crisp sun spot, a stronger targeted pulse may be considered. For melasma, many doctors deliberately stay at low energy, because overheating the skin can provoke the very darkening the visitor wants to reduce. When comparing options, asking how a device will be set up for your pigment type is often more revealing than asking which device is used.
Who may need a different or gentler plan
Pigment work carries extra caution for anyone whose skin tends to darken after injury, which includes many people with medium to deep skin tones. In these cases a doctor may lower energy, test a small area first or favor topical management.
- Pregnancy or breastfeeding, when many lasers and some oral agents are usually postponed
- Recent or current isotretinoin use, which may affect how skin heals after energy treatments
- A fresh tan or planned heavy sun exposure soon after treatment
- Medications or supplements that increase light sensitivity
- Active cold sores, infection or broken skin in the treatment area
- A personal history of keloids or abnormal scarring
- Darker skin types with a known tendency toward post-inflammatory hyperpigmentation
Risks and what recovery tends to look like
The side effect people most often worry about is post-inflammatory hyperpigmentation, a temporary darkening that can appear when the skin reacts to heat. Less commonly, repeated aggressive toning has been linked to pale, mottled spots, and too much energy can cause blistering or burns. Swelling and redness are common and usually short-lived.
Recovery varies by category. Low-energy toning often leaves only brief redness. Targeted spot treatment may produce small dark crusts that look like coffee grounds before flaking away over several days. Daily broad-spectrum sunscreen during and after a course is treated by most doctors as part of the treatment itself, not an optional extra.