If you've noticed new brown or gray-brown patches on your face this year, you're not alone. Every August, patients walk into our Boise offices convinced they have "sun spots" from a summer of hiking, boating, and yard work around the Treasure Valley. Sometimes that's exactly right. Other times, what looks like sun damage is actually melasma — and the difference matters more than most people realize.
We covered some of this territory in our post on stubborn dark spots after summer, but melasma deserves its own conversation. It behaves differently, it responds to different treatments, and if you treat it like ordinary sun damage, you can trigger a flare that lasts months longer than it needs to.
**Why Boise Skin Is Especially Prone to Both**
Idaho's high-altitude sun, dry air, and long daylight hours in summer put a lot of UV stress on skin — even on cloudy days, even through a car windshield on the commute home from Meridian or Eagle. That kind of chronic sun exposure is a major driver of solar lentigines, the technical term for classic sun spots. It's also one of the biggest triggers for melasma flares in patients who are already predisposed.
**What Sun Damage (Solar Lentigines) Usually Looks Like**
- Distinct, well-defined spots — often described as "freckle-like" but larger
- Commonly appears on the backs of hands, forearms, chest, and face
- Tends to be scattered rather than symmetrical
- Develops gradually over years of cumulative UV exposure
- Most common in patients over 40, though we see it earlier in avid outdoor enthusiasts
**What Melasma Usually Looks Like**
- Larger, blotchy patches rather than distinct spots
- Almost always symmetrical — appearing in matching patterns on both cheeks, the forehead, upper lip, or bridge of the nose
- Tends to darken quickly with sun exposure, heat, or hormonal shifts (pregnancy, birth control, certain medications)
- More common in women and in patients with medium to deeper skin tones
- Can appear or worsen seemingly overnight after a single intense sun exposure
**The Overlap That Confuses Patients**
Here's where it gets tricky: melasma and sun damage can absolutely coexist on the same face. We frequently see patients with a background of melasma that's been quietly present for years, plus new solar lentigines layered on top from this summer's sun exposure. Without a trained eye — and sometimes a Wood's lamp exam to assess pigment depth — it's genuinely difficult to tell them apart just by looking in a mirror.
This is exactly why "I found some dark spots, I'll just try a lightening cream" is one of the more common frustrations we hear. Many patients tell us they've tried several over-the-counter products, or even been to another provider, without anyone actually explaining what they were treating in the first place.
**Why the Distinction Changes Your Treatment Plan**
This is the part that matters most. Sun damage generally responds well to light-based treatments — options like BBL Hero or a well-timed chemical peel can fade solar lentigines significantly, often in just a session or two.
Melasma is more sensitive. Aggressive heat or certain laser settings can actually stimulate melanocytes and make melasma darker — a frustrating setback for anyone who invested in treatment expecting improvement. Effective melasma care usually starts with identifying and controlling triggers, often paired with targeted topical therapy, and only sometimes layering in gentle procedures once the pigment is more stable. Strict, daily broad-spectrum sun protection isn't optional here — it's the foundation everything else is built on.
At Treasure Valley Dermatology, our approach starts with getting the diagnosis right before recommending anything. That's the difference between a treatment plan that works and one that quietly makes things worse.
**When to Come In**
If you're dealing with new or changing dark patches on your face, it's worth having a board-certified dermatologist take a look — not just to confirm melasma versus sun damage, but to rule out anything else that warrants attention. If you haven't had a full skin check recently, this is also a good moment to consider a skin cancer screening while you're in.
Our team is committed to identifying the underlying cause of what's happening with your skin, not just handing you a generic cream and hoping for the best. Whether it's melasma, sun damage, or both, we'll walk you through exactly what we're seeing and why we're recommending a specific path forward.
Ready to find out what's really going on with your skin? Learn more about our melasma treatment options, or schedule a visit at one of our two Treasure Valley locations.
