Brown patches on the face take different courses depending on the cause. Melasma is driven by sunlight and hormones together, and darkens again if care stops. Sunspots are small spots where sun has accumulated, and a seborrheic keratosis is a place where the skin itself has grown. The brown left after acne is color remaining after inflammation has ended.
3-line summary
Apply SPF 30 or higher every day, and reapply when you sweat. If sun protection is skipped, the color darkens again.
Sunspots are targeted as individual spots; for melasma and inflammatory marks, intensity is lowered. Brown can remain again after laser.
Seborrheic keratosis is not a matter of removing color; the lesion is removed by freezing, shaving, or laser.
Brown patches are separated this way
First confirm whether they spread left and right, sit apart like spots, rise when touched, or appeared on an acne or wound site. Color from a sunburn and brown after inflammation often fade once the irritation stops, but with melasma the patch often remains even after that irritation has settled. For a closer look at melasma alone, continue with the melasma removal methods guide.
| Type | Why it tends to appear | What you see | Over time |
|---|---|---|---|
| Melasma | Sunlight, hormones such as pregnancy and birth-control pills, predisposition | Brown that spreads left and right around the cheekbones, forehead, and mouth | Darkens again if irritation continues |
| Sunspots | Accumulated sunlight | Small spots with a clear border on the face, backs of the hands, and arms | Those spots remain; sun protection reduces new ones |
| Seborrheic keratosis | Age and predisposition; sunlight also involved | Slightly raised brown lesions. Face and trunk | The lesion remains. Removed when it bothers you |
| Inflammatory marks | Acne, wounds, inflammation after a procedure | Brown or gray-blue in the same shape as the inflammation | Surface brown fades; gray-blue lasts a long time |
Flat spots you can feel as level and slightly raised lesions are not treated with the same laser. Lesions that grow quickly, bleed, or change shape are examined as tissue before color is removed.
What is done differs by type
Sun protection and reducing irritation are shared. Where you intervene next differs. If acne remains, stop the inflammation first rather than a procedure that targets color.
| Type | What to do first | Used in procedures |
|---|---|---|
| Melasma | Daily sun protection, prescription cream | Several times at low intensity. Sequence is in the melasma guide |
| Sunspots | Daily sun protection | Laser that targets one spot at a time |
| Seborrheic keratosis | Confirm the shape | Remove the lesion with cryotherapy, electrosurgery, or laser |
| Inflammatory marks | Stop acne and picking, sun protection | Topical brightening. Laser when needed |
※ On the day of laser, erythema and swelling remain. If irritation stacks, brown can form again at that site, so intensity is not raised to finish in one session.
Reduce sunlight and irritation first
The irritation that darkens color again is sunlight. Apply SPF 30 or higher with a broad-spectrum label even on cloudy days, and reapply when you sweat or wipe with a towel. Use a hat and shade together. The daily habit can be read further in the daily sunscreen use guide and the summer pigmentation prevention guide.
Squeezing acne or pushing keratin hard leaves brown at that site. For retinol and acid products, check the reaction on a small area before widening the range. Do not rub spots that already have color with your hands.
Lasers are chosen according to type
For sunspots that sit apart like spots, fading has been reported with both short-pulse pico toning and conventional spot lasers. Spot lasers leave erythema on the day, and brown remaining again after laser has also been reported.
Melasma uses low-intensity, repeated laser toning together with medicine and sun protection. With laser alone, color often returns within months, and white spots are reported as intensity and session counts accumulate. The flow can be read in the laser toning guide and the pico toning vs laser toning comparison.
For inflammatory marks, topical medicine comes first and laser is added after. Laser itself can become inflammation and leave color again. Seborrheic keratosis is not a procedure that targets color; the lesion is removed. If inflammation remains, or if color has darkened further after a recent laser, confirm that reaction first before raising intensity. Keep sun protection from the day of the procedure, use a non-irritating cleanser, and postpone saunas and strong exfoliation. For sun after a procedure, follow the post-treatment sun protection guide; for shared precautions, follow the treatment safety information.
Questions to sort out today's spots
If you confirm the items below in order before consultation, the order of addressing today's patches is set.
- □ Does this patch spread left and right, or sit apart like a spot?
- □ Did it appear on an acne, wound, or procedure site? Is it still red or raw?
- □ When touched, is it flat, or slightly raised?
- □ Have you described the sunscreen and topical medicines you use, and any habit of squeezing or rubbing?
- □ Pregnancy or birth-control pills, or color that darkened after a recent laser? Any lesion that grew quickly or bled?
Frequently asked questions
Q1. How long do results last after a procedure?
Melasma darkens again if sunlight and hormones continue. After a sunspot has lightened, keeping sun protection reduces new spots. Inflammatory marks leave color again if acne repeats.
Q2. How many sunspot laser sessions are needed?
For sunspots, have one session, see the response, and add another if the spot remains. Melasma and inflammatory marks are divided across several sessions.
Q3. Can topical medicine and laser be used together?
For melasma, laser is added while sun protection and medicine are maintained. For inflammatory marks, laser is placed after acne and irritation have first been stopped. If irritation stacks on the same day, medicine is paused for a few days.
Q4. Who should postpone treatment?
Postpone removing color from sites where inflammation remains, and from sites where color has darkened further after a recent laser. Pregnancy and birth-control pills can darken melasma, so mention them in advance.
Q5. Do seborrheic keratoses have to be removed?
Removal is a choice when the lesion bothers you. If it grows quickly or bleeds, the lesion is examined as tissue first.
Results, duration, and suitability vary with individual skin condition, age, and lifestyle, and the same outcome cannot be guaranteed.
Procedures may cause temporary redness or swelling, and contraindications may apply, so please confirm these during your consultation.
This article is general information and does not replace individual medical care. Please confirm diagnosis and treatment suited to your condition during a consultation.
Sources
- Textbook summary of postinflammatory hyperpigmentation (PMID 32644576)
- Overview of diagnosis and management of pigmentary disorders (PMID 29431372)
- Espósito ACC et al. (2022), Dermatol Ther (Heidelb): Update on Melasma-Part I: Pathogenesis (PMID 35904706)
- Kim JY et al. (2020), Ann Dermatol: A Split-Face, Single-Blinded, Randomized Controlled Comparison of 532 nm Picosecond Neodymium-Doped Yttrium Aluminum Garnet Laser versus 532 nm Q-Switched Neodymium-Doped Yttrium Aluminum Garnet Laser in the Treatment of Solar Lentigines (PMID 33911703)
- Literature review of seborrheic keratosis (PMID 36892019)
- Davis EC et al. (2010), J Clin Aesthet Dermatol: Postinflammatory hyperpigmentation: a review of the epidemiology, clinical features, and treatment options in skin of color (PMID 20725554)
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