Dark spots, melasma, uneven tone. What causes them, what fades them, and why most advice gets it wrong.
Summer isn't just about more sun. It's more UV, more visible light, more heat, and more sweat-related friction, all at once. But winter has its own risks that most women don't expect. Here's how pigment risk shifts across the year and when to adjust your approach.
Heat triggers pigment production through a pathway that has nothing to do with sunlight. If your hyperpigmentation worsens in summer despite good sunscreen use, or flares after cooking, exercise, or hot showers, heat may be the variable your routine isn't addressing.
Blue light and visible light trigger melanocyte activity through a pathway that has nothing to do with UV. For women with darker skin tones, this is one of the reasons pigment returns even with consistent sunscreen use. Here's how it works and what to do about it.
If you wear sunscreen every day and your pigment still comes back, you're not doing it wrong. Sunscreen covers one category of trigger. Hyperpigmentation responds to several. Here's what SPF actually protects against, what it doesn't, and what fills the gaps.
If you live with eczema, chronic hives, food sensitivities, or allergic reactions, the same inflammatory pathway driving those conditions is also reaching your melanocytes and keeping pigment active.
If your pigment doesn't respond to treatment, and you're also noticing fatigue, weight changes, or temperature sensitivity, your thyroid may be maintaining the problem from underneath.
PCOS creates a compounding pattern where androgens, insulin resistance, and chronic inflammation drive pigment from multiple directions at once. This is why topical-only approaches so often plateau.
If you're low in iron, B12, folate, or B6, your skin doesn't have the raw materials it needs to turn over pigmented cells and resolve inflammation. These are the deficiencies most likely to be silently stalling your progress.
Moderate exercise reduces inflammation and supports pigment fading. But intense training, overtraining, and exercise-related heat exposure can push things in the other direction. The dose makes the difference.
Specific foods and dietary factors influence pigment through inflammation, insulin signalling, and oxidative stress. This covers what we actually know about sugar, dairy, alcohol, and protein, and where the evidence gets thin.
Your topical routine works at the surface. Your internal health determines what's happening underneath. The most stable results come from addressing both, because they're solving different parts of the same problem.
Melasma is driven by ongoing internal signals. PIH fading speed depends on your internal inflammatory and nutrient environment. Why the type you have determines how much your internal health matters.
