Melasma vs Solar Lentigines: What Is Causing Your Facial Spots?

If you woke up this morning and, upon looking in the mirror, noticed darker tones you don’t recall having yesterday, you might be feeling that common frustration. There is a sense of uncertainty when the sun in Medellín seems to have marked your face without permission, especially if you live near the coast or work outdoors. Many people are initially alarmed, thinking it is permanent or that it is their genetics’ fault, but the truth is that it almost always has a clear and manageable cause.

Our Approach in Consultation

In consultation, I see that most patients ask me this with the same voice: “Doctor, are they the same?”. It is normal to feel confused because the spots look very similar, but in reality, they are two distinct enemies of your skin. One is a chronic hormonal reaction that lasts for years, and the other is a sunburn that remains a permanent mark if not cared for properly. I understand that wanting to know the difference is the first step to feeling less helpless regarding the problem.

Solar lentigines, or solar lentigines, are those light brown or coffee-colored tones that appear in areas where the skin received significant heat and ultraviolet radiation over the years. Imagine your skin as a book that has been written on over time; if the sun wrote many times on certain pages, those marks remain there. Unlike other spots, these do not usually appear out of nowhere without prior exposure. They are very common in people with fair skin and are a natural defense mechanism against sun damage.

Melasma is a completely different story. It is a hyperpigmentation that affects specific areas of the face, such as the cheeks, the bridge of the nose, or even the forehead and upper lip. Unlike solar lentigines, which are often irregular, melasma tends to form more symmetrical and diffuse patterns. People believe it is an unchangeable genetic mark present from birth, but that is not the case. It is your body’s response to specific hormones, such as progesterone and estrogen, which stimulate melanin-producing cells to work in excess.

There is a very important nuance that people often ignore, and I want to share with you honestly. They believe that melasma disappears magically after some treatments or when they stop taking birth control pills. The reality is that it is controlled, not that it disappears forever. Although the hormonal cause may change temporarily, the melanocytes already have a memory of the damage. Therefore, treatment must be constant and preventive, not just a quick emergency solution.

In my consultation, we treat both conditions with very different protocols because treating them equally would do more harm than good. If you try to erase solar lentigines with aggressive lasers intended for melasma, you could worsen the situation by creating new spots. What we do is first identify exactly what type of pigmentation you have through close observation and, sometimes, a light test to see the depth of the color.

For melasma, at Verassere we design strategies that avoid triggers such as direct sunlight and certain irritating creams. We use gentle chemical peels that cover the skin’s surface without damaging it, helping to renew the superficial cells. We also apply facial mesotherapy to introduce antioxidants directly into the dermis and calm the underlying inflammation that feeds the spots. It is a gradual process, but seeing how the tones lighten step by step gives a huge sense of achievement.

Signs You Should Consult

If you have solar lentigines, the focus shifts to protecting and correcting without irritating. We use selective pigment lasers that target only the melanin clumps accumulated from the sun, leaving the surrounding healthy skin intact. It is like a very precise surgical squad that cleans up sun damage without damaging your face’s natural barrier. In some cases, we combine this with regulating creams to ensure that no new marks reappear due to accidental exposure.

It is fundamental to recognize early warning signs because ignoring them can lead to more complex treatments in the future. If you notice new spots appearing after a season of intense sun, or if existing spots become darker and more diffuse, it is time to act. Do not wait until the skin has completely changed color or until you feel ashamed of the photos you take in the mirror.

Many patients tell me: “Doctor, how do I know if it is melasma or solar lentigines?”. The answer lies in your skin’s history and where the spots appear. If they appeared right after pregnancy or while taking birth control pills, and they spread from the center outward, it is probably melasma. If they appear on the edges of the cheeks or on the neck after a very sunny season, regardless of your hormones, they are solar lentigines.

Another key difference is how they react to the sun. Solar lentigines are usually more stable and only darken with strong exposure. Melasma, on the contrary, tends to worsen quickly with any heat or UV radiation, even on cloudy days if the humidity is high. This makes it especially challenging for those living in warm climates like Medellín, where the sun never stops.

The scientific causes behind these conditions are fascinating and help explain why they do not disappear on their own. In melasma, triggering factors include not only hormones but also environmental factors such as oxidative stress and constant facial friction, such as from rough towels or dirty pillows. In solar lentigines, the main cause is the accumulation of cellular DNA damage from UV photons that were not filtered by melanin, causing an uncontrolled overproduction.

In my daily practice, I always seek to understand the life context of each patient to design a plan that makes sense for their routine. Sometimes the solution lies in changing a small habit, such as using sunglasses with real UV protection or switching to a sunscreen that does not cause acne. Other times, it requires a combination of therapies that support each other to achieve sustainable results.

If you have doubts about your type of spot, the best option is to speak directly with me or with a specialist who can evaluate your case individually. There is no rush or judgment; we only want to ensure you receive the correct treatment for your specific skin. Correct information gives you power and allows you to make informed decisions without fear of making mistakes.

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If what you read generates doubts, we are happy to answer: Schedule a consultation.