What causes freckles?
Freckles, or ephelides, are small, flat brown spots linked to genetics and sunlight. Ultraviolet (UV) exposure increases melanin, the pigment that gives skin its colour, making freckles more noticeable. They often appear in childhood on the nose, cheeks, shoulders or arms.
Freckles are more common in fair skin, but people with other skin tones can have them too. They occur in both men and women. Sensitive or easily irritated skin is not the same as skin that freckles easily.
Are freckles the same as sunspots?
No. Ephelides usually darken with sun exposure and may fade when exposure decreases. Solar lentigines, often called sunspots or age spots, develop with accumulated sun exposure and tend to remain visible even when you spend less time outdoors.
Neither appearance nor colour alone confirms the diagnosis. A new brown spot, raised growth or grey-blue patch may be a different condition and should not automatically be treated as a freckle.
Freckles, melasma and post-inflammatory marks
“Dark spots” is a broad description, not a single diagnosis. These conditions can occur together, but their care may differ.
| Skin concern | Typical appearance | Main factors | Response to sunlight |
|---|---|---|---|
| Freckles (ephelides) | Small, flat brown spots | Genetics and UV exposure | Often darken with exposure and fade when it decreases |
| Melasma | Brown or grey-brown patches, often on both sides of the face | Genetics, hormonal influences and light exposure | UV and visible light can worsen pigmentation |
| Post-inflammatory hyperpigmentation (PIH) | Flat dark marks where acne, a rash or an injury has healed | Skin inflammation or injury | Sun exposure can make marks darker |
Can freckles fade or come back?
Ephelides may become less noticeable with reduced sun exposure or as you get older. Sunspots are usually more persistent. Treatment can lighten some spots, but it cannot remove an inherited tendency to freckle or guarantee that pigmentation will never return.
Once a doctor has confirmed that a spot is benign, removing it is a cosmetic choice. Freckles do not need treatment simply because they are visible.
Daily care for life in Thailand
- Protect exposed skin every day. Choose a broad-spectrum, water-resistant sunscreen with SPF 30 or higher. Reapply about every two hours outdoors and after swimming or sweating, following the label.
- Add shade and clothing. A wide-brimmed hat and protective clothing help during commutes, outdoor exercise and beach trips. Sunscreen does not block all UV.
- Keep skincare gentle. Harsh scrubs or several brightening products used together can irritate skin and leave additional dark marks.
If you also have melasma or persistent post-inflammatory pigmentation, ask about tinted sunscreen containing iron oxides for visible-light protection.
What can help if you want to lighten freckles?
Start with a skin assessment. The appropriate option depends on whether the marks are ephelides, sunspots or another condition, as well as your skin tone and tendency to develop pigmentation after irritation.
Topical products: Some medicines can lighten sunspots, but a cream marketed for “dark spots” will not treat every diagnosis. Hydroquinone and prescription retinoids need individual guidance; irritation can worsen pigmentation. Avoid hydroquinone and retinoids during pregnancy; retinoid medicines should also be avoided when planning pregnancy.
Laser, IPL or peels: Pigment-targeting lasers and intense pulsed light (IPL) may lighten selected freckles or sunspots. IPL is a light treatment rather than a laser. Chemical peels may help some sunspots. Results and recovery vary; none is suitable for every skin tone or brown lesion.
Possible complications include burns, prolonged redness, darker or lighter patches and scarring. Skin prone to post-inflammatory pigmentation needs particular care. Ask about the expected improvement, downtime and total cost before agreeing to treatment rather than relying on a fixed session count.
After a procedure, follow the treating clinician’s wound-care instructions, avoid picking crusts, and ask when to restart sunscreen, acids or retinoids if the skin is still healing.
When should a spot be checked?
Arrange a prompt dermatology assessment for a new or changing spot, one that looks different from your other marks, has an irregular border or several colours, or starts itching or bleeding. Do this before trying to fade it with a cream, peel or laser.
These changes do not necessarily mean skin cancer, but some important skin conditions can resemble harmless pigmentation. For established freckles that bother you, a consultation can help you decide whether treatment is worthwhile.
References
- Yamaguchi K, et al. Association of MC1R polymorphisms with skin reflectance and freckles in Japanese. Journal of Human Genetics. 2012.
- Wang CC, et al. Q-switched alexandrite laser versus IPL for freckles and lentigines in Asian persons. Journal of the American Academy of Dermatology. 2006.
- DermNet. Ephelis and Solar lentigo.
- American Academy of Dermatology. What can get rid of age spots? and How to apply sunscreen.
- American Academy of Dermatology. What to look for: ABCDEs of melanoma.
- American Academy of Dermatology. Dermatologist-approved pregnancy skin care. Medicines and Healthcare products Regulatory Agency. Pregnancy precautions for topical retinoids.
- Castanedo-Cazares JP, et al. Near-visible light and UV photoprotection in the treatment of melasma: a double-blind randomized trial. 2014. American Academy of Dermatology. How to fade dark spots in darker skin tones.