Sun Spots, Freckles or Melasma? How to Tell the Difference
Grow up under the Australian sun and you'll almost certainly end up with a few brown marks to show for it. Some appear in childhood and come and go with the seasons. Others creep in during your thirties and forties and stay put. And some arrive as wide, blotchy patches that seem to have a mind of their own.
They can look similar in the mirror, but freckles, sun spots and melasma are different things with different causes. Knowing which one you're dealing with shapes what helps, what to avoid, and when a spot isn't a cosmetic concern at all. This guide walks you through each type so you can have a more informed conversation with a skin professional.
Freckles (Ephelides)
Freckles, known medically as ephelides, are small, flat, light brown or tan marks. They usually show up in early childhood, often scattered across the nose, cheeks, shoulders and arms, and they're especially common in people with fair skin and red or light hair.
The giveaway with freckles is how they behave across the year. They darken noticeably in summer as your skin responds to UV, then fade again through the cooler months. That seasonal rhythm is driven largely by your genes, which is why freckles tend to run in families.
Freckles themselves are harmless. They are, however, a sign that your skin is sensitive to sun, and that's worth taking seriously when it comes to sun protection and regular skin checks.
Sun Spots, Age Spots and Lentigines
Sun spots go by plenty of names, including age spots, liver spots and, in clinical terms, solar lentigines. Whatever you call them, they're flat, well-defined brown marks that develop on the skin that sees the most sun over a lifetime: the face, the backs of the hands, the forearms, shoulders and upper chest.
Unlike freckles, sun spots are caused by years of accumulated UV exposure rather than genetics alone. They tend to appear from middle age onwards, although in Australia it's common to see them much earlier. They're usually larger than freckles, can range from light tan to dark brown, and crucially, they don't fade in winter. Once a sun spot has formed, it generally stays.
Sun spots are benign, but some skin cancers can look similar to them in their early stages. That's one reason any new or changing brown spot deserves a proper look from a doctor, which we cover further down.
Melasma
Melasma looks quite different once you know what to look for. Rather than individual spots, it appears as larger, blotchy patches of light to dark brown pigmentation with soft, irregular edges. It's typically symmetrical, turning up on both cheeks, across the forehead, on the bridge of the nose, along the jawline or above the upper lip.
Melasma is far more common in women than men, and it usually first appears between the ages of 20 and 40. It's most common in people who tan easily or have naturally medium to brown skin tones, although it can affect anyone.
What Causes Melasma?
Melasma doesn't have a single cause. It develops when pigment-producing cells in the skin become overactive, and several factors can switch them on:
Sun exposure. Both UV and visible light encourage melanin production, which is why melasma often darkens in summer.
Hormones. Pregnancy, the contraceptive pill and hormone replacement therapy are well-known triggers. Melasma is sometimes called the "mask of pregnancy" for this reason.
Genetics. Around 60% of people with melasma report a family member who has it too.
Heat. Many people find their melasma flares after time in hot environments, from saunas to a summer kitchen.
Skincare and medications. Some perfumed products and certain medications can make skin more reactive to light.
Because hormones, heat and visible light all play a role, sunscreen alone often isn't enough to keep melasma in check. That's a big part of why it behaves so differently from sun spots.
Melasma vs Sun Spots
The simplest way to tell them apart is shape and edges. A sun spot is a distinct, well-defined mark you could trace around with a fine pen. Melasma is a hazy patch that blends into the surrounding skin, more like a shadow than a dot.
Location and timing help too. Sun spots appear wherever the sun has hit most over the years, including the hands and arms. Melasma sticks mostly to the face, follows a symmetrical pattern, and is often linked to a hormonal change such as a pregnancy or starting a new contraceptive.
Melasma vs Freckles
Freckles are small, numerous and scattered, and they usually date back to childhood. Melasma tends to appear in adulthood as broader patches that cover a larger area.
Both can darken in summer, which is where people sometimes get confused. The difference is that freckles reliably fade in winter, while melasma often lingers year-round, even if it lightens a little in the cooler months.
Freckles, Sun Spots and Melasma at a Glance
| Freckles | Sun spots | Melasma | |
|---|---|---|---|
| Appearance | Small, light brown, scattered dots | Flat, well-defined brown spots | Larger, blotchy patches with soft edges |
| Where it shows up | Nose, cheeks, shoulders, arms | Face, hands, forearms, chest, shoulders | Cheeks, forehead, nose, upper lip, jaw |
| Main triggers | Genetics and sun | Years of accumulated UV | UV, visible light, hormones, heat, genetics |
| Fades in winter? | Yes, usually | No | Sometimes lightens, rarely clears |
| Common in | Fair skin, often from childhood | Adults with a history of sun exposure | Women aged 20 to 40, medium to brown skin tones |
Why the Difference Matters for Treatment
It would be convenient if every brown mark responded to the same treatment, but pigmentation doesn't work that way. Light-based treatments that can improve the appearance of sun spots, such as BBL HEROic, work by targeting pigment with energy and heat. On well-defined sun spots that can be very useful. On melasma, the same approach can sometimes make pigmentation worse if it isn't carefully matched to the skin.
That's why a proper assessment always comes before treatment. A clinician needs to look at your skin in good light, understand your history and work out what type of pigmentation you have before recommending anything. Our article on what happens in a skin consultation explains what that involves.
Timing matters as well. Many pigmentation treatments are better suited to the cooler months, when your skin has less sun exposure to recover from. We explain how to plan around the seasons in Pigmentation Treatment in Summer: Protect Now, Correct Later, and our guide on how to get rid of pigmentation covers the options in more detail.
When a Spot Needs a Doctor, Not a Facial
Skin cancer is Australia's most common cancer by a wide margin. According to Australian Institute of Health and Welfare data released in August 2026, around 535,000 Australians have at least one common non-melanoma skin cancer removed each year, and two in three Australians will be diagnosed with skin cancer in their lifetime.
This article can help you understand pigmentation, but it can't tell you whether a particular spot is harmless. Please see your GP or a dermatologist for a skin check if you notice a spot that is new, changing in size, shape or colour, has an irregular border, contains several colours, is raised, itchy or bleeding, or simply looks different from your other spots.
If anything about a spot concerns our nurses during an appointment, we'll recommend you have it checked by a doctor before any cosmetic treatment goes ahead.
How to Prevent New Pigmentation
Whichever type you have, prevention is the part that makes everything else work. Daily broad-spectrum SPF50+ is the foundation, applied generously every morning and reapplied every two hours when you're outdoors. Add a broad-brimmed hat, sunglasses and shade during the middle of the day, when UV is at its strongest.
Melasma needs a little extra care. Because visible light can trigger pigment, a tinted sunscreen containing iron oxides offers an added layer of protection that a clear formula can't. It's also worth limiting heat where you can. If you're unsure whether your current sunscreen is up to the job, our guide to sunscreen recalls in Australia explains how to check it and what to look for.
Frequently Asked Questions
Can freckles turn into sun spots?
No. Freckles and sun spots are different types of pigmentation, and one doesn't become the other. That said, people with lots of freckles have sun-sensitive skin, so they're more likely to develop sun spots over time if their skin isn't well protected.
Does melasma ever go away?
Sometimes. Melasma triggered by pregnancy or hormonal contraception may fade on its own in the months after the trigger is gone. For many people, though, melasma is a long-term condition that improves and returns, often flaring each summer. With consistent sun protection and the right professional care, its appearance can often be improved and kept under better control.
Does pregnancy cause melasma?
Pregnancy is one of the most common triggers, thanks to the hormonal changes involved. It often lightens in the months after birth, but it can return in later pregnancies. During pregnancy, careful sun protection is the main focus, and it's best to hold off on starting new treatments until you've spoken with your doctor.
Can men get melasma?
Yes. It's much less common in men than in women, but men can and do develop melasma, particularly those with medium to brown skin tones, a family history or a lot of sun exposure.
Not Sure What You're Dealing With?
Book a skin consultation and we'll assess your pigmentation and talk you through your options. Our cosmetic nurses at our South West Sydney clinic will take the time to understand your skin, your history and your goals before recommending anything.
If you have a spot that's new, changing or worrying you, please have it checked by your GP or a dermatologist first.
