Facial dark spots: why they appear and what really works
Sun spots, melasma, acne marks: not all pigmentation is the same or treated the same. What causes it, how we map it with artificial intelligence and which treatments work — no miracle remedies.
Dr. Camila Guzmán · Medical Director
9 min
Few things age a face more than uneven tone — and few consultations do we receive more often, especially at the end of summer. Dark spots cause a particular frustration: money is spent on creams that do nothing, home remedies are tried that make things worse, and meanwhile the spot is still there, or comes back every year.
The reason for so much failure is almost always the same: the spot is treated without knowing what type of spot it is. That is not a nuance — it is the key to everything. This guide explains the main types, why they appear, how we diagnose them with the support of artificial intelligence and what really works for each case.
Not all spots are the same: the 4 main types
Identifying the type changes the treatment, the expectations and even the recommended time of year to treat them:
Solar lentigines
Accumulated sunWell-defined brown spots on exposed areas: face, décolletage, hands. They are the bill for years of accumulated sun and the ones that respond best to depigmenting treatment and peels.
Melasma
HormonalBroad, diffuse patches, typically on the forehead, cheekbones and upper lip. It has a hormonal component (pregnancy, contraceptives) and is recurrent: it can be controlled very well, but demands consistency and strict photoprotection. Promising a 'definitive cure' is deceiving.
Post-inflammatory hyperpigmentation
After acne or woundsThe dark mark left by a pimple, a wound or an aggression to the skin (including poorly applied treatments). It improves with controlled cell renewal — and worsens if manipulated.
Freckles and genetic spots
Family traitsFreckles have a genetic basis and intensify with the sun. They are not a medical problem: treating them or not is a purely aesthetic decision — and often the honest answer is to leave them alone.
Diagnosis decides the result (and here AI makes the difference)
Spots appear when melanocytes — the cells that produce pigment — generate melanin irregularly, with the sun as the main accelerator. But the same brown spot can be a lentigo, melasma or a post-inflammatory mark, and each demands a different approach. Treating melasma as if it were a lentigo is the classic recipe for failure — and rebound.
How skin pigment is produced
That is why at Cambria Clinic the first step is always the facial diagnosis with artificial intelligence: the system maps your skin zone by zone and helps us identify spots and affected areas with objective data, which our medical team interprets to classify the type of pigmentation and design the plan. You see it on screen, with your own images.
How a solar lentigo develops
The AI diagnosis is the difference between treating blindly and treating with judgement. Book your AI facial diagnosis →
⚠ Important: if a spot changes shape, colour or size, itches, bleeds or has irregular borders, it is not an aesthetic case — book an appointment with your dermatologist without delay. At our clinic, any lesion that raises doubt is referred immediately. That is rule number one.
What really works, in order
Treating dark spots is a long-distance race on three fronts: slowing pigment production, renewing what is already deposited and preventing it from coming back.
1Daily SPF 50 photoprotection
The preconditionFor everyone, 365 days a year.
Without strict photoprotection, any depigmenting treatment fails: the sun reactivates pigment faster than you can remove it. Broad-spectrum SPF 50 every morning — in winter and on cloudy days too — and reapplication if you spend hours outdoors. It is 50 % of the result.
2Topical depigmenting agents with medical guidance
The base treatmentFor almost every type of spot, as a base or maintenance.
Actives such as retinoids, azelaic acid, vitamin C or depigmenting combinations, chosen according to your spot type and skin. The regimen matters as much as the active: poorly chosen concentrations, order and breaks irritate the skin and can pigment it further.
3Medical chemical peel
The acceleratorFor lentigines, post-inflammatory marks and dull tone; for melasma, with specific, prudent protocols.
Controlled renewal of the superficial layers that carries away deposited pigment and evens the tone in a few sessions. Preferably performed from autumn to spring, when the sun is weaker. It is our reference treatment for evening out skin tone.
4Support care: deep cleansing and mesotherapy
The terrainTo prepare and sustain the result.
Clean, hydrated skin with a healthy barrier responds better to any depigmenting agent and defends itself better from the sun. Deep facial cleansing and mesotherapy with antioxidant actives complement the plan — they do not replace it.
4 myths that make spots worse
✗"Lemon lightens dark spots."
✓Quite the opposite: citrus on the skin is photosensitising and can cause burns and new spots (phytophotodermatitis). It is probably the home remedy that ruins the most skin every summer.
✗"If the depigmenting cream stings, it means it's working."
✓Sustained irritation inflames the skin, and inflammation pigments. A well-prescribed depigmenting agent may cause some controlled dryness, but 'the more aggressive the better' is the direct path to rebound.
✗"Nothing can be done about spots in summer."
✓Peels are reserved for lower-sun seasons, but photoprotection, the right topicals and the diagnosis are done all year round. In fact, summer is the best time to plan the autumn treatment.
✗"Spots only appear from sunbathing."
✓The sun is the great accelerator, but melasma has a hormonal component, post-inflammatory marks come from acne or wounds, and freckles are genetic. That is why diagnosing the type matters more than any product.
With dark spots, well-directed patience always beats aggressiveness. My rule in consultation is simple: first know what spot it is, then choose the active, and always — always — photoprotection. Whoever skips the first step ends up paying for the other two several times over.— Dr. Camila Guzmán, Medical Director of Clínica Cambria
Want to know what type of spots you have?
Start with the facial diagnosis with artificial intelligence at Cambria Clinic (La Cañada, Paterna): we map your skin zone by zone, classify your spots with medical judgement and design a realistic plan with a fixed quote. Free and with no obligation.
Book your AI facial diagnosis →Learn about our medical chemical peel →
WhatsApp · +34 624 18 52 49Frequently asked questions about facial spots
Why do I get more spots as I age?
Sun damage is cumulative: the skin 'remembers' every exposure, and over the years melanocytes respond more irregularly. That is why lentigines typically appear from age 40-50 on the most exposed areas, even though their origin lies in the sun of decades earlier.
Can melasma be cured permanently?
The honest answer is that it is controlled, not cured: it has a hormonal component and tends to reactivate with the sun. With the right treatment and strict photoprotection, very visible and stable improvements are achieved — but beware of anyone promising to remove it forever.
What is the best time of year to treat spots?
Peels and intensive depigmenting treatments are preferably done from autumn to spring, with less solar radiation. Photoprotection, maintenance topicals and the diagnosis have no season: they are done all year round.
How many peel sessions will I need?
It depends on the type of spot and the depth of the pigment: protocols of 3 to 6 spaced sessions combined with a home regimen are typical. At the diagnosis we give you a specific plan with realistic expectations.
What does artificial intelligence add to spot diagnosis?
Objectivity and detail: the system maps your skin zone by zone and helps us identify spots and affected areas with data, not just by eye. On that map, our medical team classifies the type of pigmentation and designs the treatment — and at follow-up you can see the progress.
Do I need sunscreen in winter too?
Yes. UVA radiation — the main driver of pigment and ageing — is present all year round and passes through clouds and glass. If you are treating spots, daily SPF is non-negotiable 365 days a year.
When should I see a dermatologist instead of an aesthetic clinic?
Whenever a spot changes shape, colour or size, itches, bleeds or has irregular borders. With any doubtful lesion, at our clinic we refer you to the dermatologist immediately: safety comes before any aesthetic treatment.
Article reviewed by
Dr. Camila Guzmán
Medical Director of Clínica Cambria · Licensed physician nº 03-0314801
This article is for informational purposes, has been reviewed by the Clínica Cambria medical team, and in no case replaces an individual medical assessment.
