I’ve been obsessed with aesthetics for more than 20 years, long before I had my practice or my skin-care line, Lenox and Sixteenth. Over the course of my career, and in aesthetics more broadly, one thing has remained consistent: we tend to attribute a fair share of skin concerns to inflammation. And in most cases, we’re right. But there’s another, less obvious contributor I see again and again, something we refer to as trapped heat. Ahead, I’m breaking down what that actually means—and why it matters for your skin.
What Is Trapped Heat?
When heat is introduced into the skin, whether through environmental exposure, certain treatments or prolonged internal temperature elevation, the body doesn’t always dissipate it efficiently. Instead, it lingers within the tissue. This sustained elevation in temperature increases vascular activity and stimulates melanocytes, the cells responsible for pigment production.
For anyone prone to hyperpigmentation, especially melasma, more often than not, this is where the issue begins.
Understandably, we tend to think of UV exposure as the primary trigger for pigmentation, but sometimes, heat alone is powerful enough to activate melanogenesis. That means that even without direct sun exposure, and with all the SPF in the world, the skin can still respond as if it is under stress. In my practice and when training new aestheticians, any source of prolonged or repeated heat in the skin is approached with caution, delivered with intention, control and proper recovery instructions.
You May Want to Cool it on the Hot Yoga
One of the most common misconceptions I’ve noticed is about wellness trends perceived as universally beneficial. Hot yoga is an excellent example. While I’d never knock its cardiovascular and mental health benefits, from a skin perspective, prolonged exposure to elevated temperatures, especially in a humid and enclosed environment, can contribute to ongoing vascular stimulation and pigment activation. If you’re dealing with melasma, this can be particularly problematic.
The same applies to certain at-home devices or treatments that generate heat without controlled delivery or clear directions for appropriate post-care. It’s not that heat-based treatments are inherently problematic; they’re not. In fact, many of our most effective technologies rely on it. The difference is that in clinical settings, treatments are carefully calibrated and monitored, then paired with protocols designed to control inflammation and support recovery.
We Need to Have the Skin Quality Conversation
This is the part where we ask ourselves an important question: How do we define healthy skin?
Addressing wrinkles or adding volume, while a priority for many of us, is not the answer. It’s about skin quality—tone, texture, clarity and resilience. Achieving and maintaining it requires minimizing unnecessary inflammation, including chronic heat exposure.
In other words, if you’re investing in your skin by booking in-office treatments or high-performance topical regimens, but are simultaneously exposing your skin to unmanaged heat, you may be working against your own results.
What to Do Instead
I’d never ask you to eliminate heat entirely, nor is that necessary, but it’s worth being intentional about how and when you introduce it.
For those concerned with pigmentation or overall skin quality, I recommend being mindful of prolonged heat exposure and prioritizing cooling and calming the skin afterward. Supporting the skin barrier with consistent topical care and working with a provider who understands how to balance treatment intensity with recovery is key.
When it comes to the skin, it’s not just what you do to it, but how it processes whatever product, treatment or trauma it’s exposed to over time. With heat, it’s the cumulative effect that matters.
