Melasma and Sun: Proven Treatments & What to Avoid

Melasma and Sun: What Helps (and What Makes It Worse)

By Dr. Bahnmiller, Columbia Shores Regenerative Health

If you've ever noticed patches of brown or gray-brown discoloration across your cheeks, forehead, upper lip, or chin—and they seem to get darker every summer no matter what you try—you're not imagining things. You may be dealing with melasma.

Melasma is one of the most common and most misunderstood pigmentation conditions we see here at Columbia Shores. Patients often come in frustrated, having tried countless products with mixed results. The truth is, melasma responds to treatment, but it requires a strategy—not just a serum.

Let's break down what's actually happening, and what helps versus what makes it worse.

What Is Melasma?

Melasma is a chronic pigmentation condition driven by overactive melanocytes—the cells responsible for producing pigment in your skin. When these cells are triggered, they produce excess melanin, resulting in the flat, blotchy patches most commonly seen on the face.

It's far more common in women, particularly during times of hormonal change: pregnancy, birth control use, and perimenopause are all known triggers. But sun exposure is the most consistent and powerful aggravating factor—and understanding that relationship is key to managing melasma long-term.

Why Sun Makes Melasma Worse

Sunlight doesn't just trigger melasma in the moment. It activates melanocytes that are already primed to overproduce pigment. Even brief, incidental sun exposure—the kind you get walking to your car, sitting near a window, or spending 20 minutes outside—can deepen existing patches and undo months of treatment progress.

And it's not just ultraviolet (UV) light. Visible light and heat are also known to stimulate melanocyte activity, which is why melasma often worsens in summer even in people who feel like they've been careful about sunscreen.

This is important: traditional chemical sunscreens that only block UVA and UVB won't fully protect you from melasma flares. Mineral (physical) sunscreens with iron oxides are your best defense, because they also block visible light—particularly the high-energy visible (HEV) light spectrum that melanocytes respond to.

What Helps with Melasma

1. Daily Mineral Sunscreen—Without Exception

This is non-negotiable. A broad-spectrum mineral SPF 30–50 with iron oxides, worn every single day—rain, cloud, or shine—is the foundation of every melasma treatment plan. If sunscreen isn't consistent, no other treatment will hold its results.

We carry medical-grade sunscreens in our shop that are specifically formulated for pigmentation-prone skin. If you're not sure which one is right for you, we're happy to help you choose.

2. Medical-Grade Topical Skincare

Over-the-counter brightening products rarely move the needle on melasma. What works are clinically proven ingredients at the right concentrations, in the right formulations—and that's where medical-grade skincare like PCA Skin comes in.

Effective ingredients for melasma include:

• Hydroquinone – the gold standard for reducing melanin production (available by prescription or in specific medical-grade formulations)

• Kojic acid – a gentler brightening agent that inhibits tyrosinase, the enzyme that triggers pigment production

• Vitamin C – antioxidant protection that also helps fade discoloration

• Niacinamide – reduces the transfer of pigment to skin cells and supports the skin barrier

• Retinoids – increase cell turnover to push pigmented cells out faster

A proper regimen combines multiple actives strategically—not all at once, but layered in a way your skin can tolerate and benefit from. We'll build that plan with you.

3. Laser Treatments—With the Right Approach

This is where melasma gets nuanced, and where seeing a knowledgeable provider matters most.

Not all lasers are appropriate for melasma. Aggressive treatments or high-heat devices can actually trigger a rebound flare—causing the melanocytes to produce even more pigment in response to the inflammation. This is why a one-size-fits-all approach doesn't work here.

At Columbia Shores, we approach melasma treatment carefully and strategically:

Sciton Moxi is often one of our preferred tools for melasma-prone patients. As a gentle, fractionated laser, Moxi targets pigmentation and improves skin tone with low thermal impact and minimal downtime—making it one of the safer options for this condition.

BBL and IPL-based treatments can be effective for certain types of pigmentation but require careful patient selection when melasma is involved. The wrong settings or timing can worsen the condition. We assess this on a case-by-case basis, and sometimes we'll start with topicals and Moxi before considering BBL.

Morpheus8 (microneedling with radiofrequency) is another option we may incorporate, as it improves overall skin tone and texture without the same pigmentation risk associated with heat-based lasers.

The bottom line: melasma deserves a personalized treatment plan, not a standing appointment on the laser calendar.

4. Hormone Awareness

If hormonal contraceptives are contributing to your melasma, that's a conversation worth having. We won't tell you what to do with your birth control—but we will help you understand how it may be affecting your skin and factor it into your treatment approach. If you're in perimenopause and experiencing new or worsening melasma, hormone optimization may also be part of the bigger picture.

What Makes Melasma Worse

• Inconsistent sunscreen – Even one day of unprotected sun can set back weeks of progress

• Heat exposure – Saunas, hot yoga, and steam rooms can trigger flares even without direct sun

• Aggressive laser or chemical treatments – In the wrong hands or at the wrong time, these can cause post-inflammatory hyperpigmentation on top of existing melasma

• Hormonal fluctuations – Pregnancy, starting or stopping hormonal birth control, and perimenopause can all intensify melasma

• Fragrance and irritants in skincare – Inflamed skin produces more pigment; a compromised skin barrier makes everything harder to treat

Managing Melasma Is a Long Game

Melasma is a chronic condition—it can be managed well, but it requires ongoing commitment. Most patients see meaningful improvement with a consistent regimen of medical-grade skincare, careful sun protection, and appropriately timed in-office treatments. Results take weeks to months, and maintenance matters.

What I tell patients: this isn't about chasing perfection. It's about creating conditions where your skin can calm down, stay calm, and look its best.

If you've been dealing with melasma and aren't sure where to start—or if you've tried things that haven't worked—we'd love to do a consultation and create a plan that's built specifically for your skin. Every case is different, and getting it right starts with the right assessment.

— Dr. Bahnmiller