Let’s Talk About It: Why Do Dark Underarms Happen (and How to Brighten Them)?
We exfoliate. We moisturize. We do our best to glow — but sometimes, one stubborn area refuses to get the memo: our underarms (and other folds like inner thighs or elbows). If you’ve ever felt self-conscious about dark patches on your body, you’re not alone — and more importantly, it’s not your fault.
Here’s what causes body hyperpigmentation, and how you can treat it effectively and safely.
What Causes Dark Underarms and Other Areas?
1. Friction and Shaving
Constant rubbing from tight clothes, combined with frequent shaving, can irritate the skin. This triggers melanin production (your skin's natural pigment), which leads to darkening over time.
2. Dead Skin Buildup
Just like your face, your underarms and intimate areas collect dead skin cells. Without regular exfoliation, these cells can make skin look dull or patchy.
3. Hormonal Changes
Pregnancy, insulin resistance, or PCOS can lead to a condition called acanthosis nigricans, which causes dark, velvety patches in body folds.
4. Deodorants and Perfumes
Certain chemicals in deodorants or antiperspirants can irritate sensitive underarm skin. Over time, this can contribute to discoloration.
5. Genetics
Sometimes, it just runs in the family. Some skin tones are more prone to pigmentation due to higher melanin activity.
How to Treat and Brighten Dark Spots (The Smart Way)
1. Gentle Chemical Exfoliants
Look for body-safe products with AHA (like lactic acid or glycolic acid) or PHA to remove dead skin cells without scrubbing.
2. Moisturize with Brightening Agents
Ingredients like niacinamide, licorice extract, or alpha arbutin help reduce pigmentation over time while keeping the skin calm and hydrated.
3. Avoid Harsh Hair Removal
Try switching to waxing or laser hair removal if shaving causes irritation. Also, avoid applying deodorant immediately after hair removal.
4. Wear Breathable Clothing
Loose, cotton-based fabrics reduce friction and give your skin room to breathe and heal.
5. Be Consistent — and Patient
Hyperpigmentation doesn’t disappear overnight. Consistency with a gentle routine is key. Avoid overdoing it with strong acids or harsh whitening products.
A Gentle Boost for Brighter, More Even Skin
Looking for a gentle yet effective solution? Mosseru Bright Serum is powered by tranexamic acid and niacinamide to visibly brighten dark underarms, inner thighs, and other shadowy spots — without irritation. Lightweight and fast-absorbing, it’s your go-to for even-toned, confident skin. See the glow for yourself.