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Summer is the season of tank tops, sleeveless dresses and suddenly being very aware of your armpits in a way you weren't in January.
Dark underarms are one of those concerns that people rarely talk about openly but search for constantly, usually right before a beach trip or a wedding where bare arms are unavoidable. If you've noticed your underarms looking darker, dull or uneven and assumed it was just something you had to live with, a board-certified dermatologist would like a word.
Here's what's actually happening. Underarm skin is some of the most stressed skin on your body. It deals with daily shaving or waxing, friction from clothing, layers of deodorant and antiperspirant buildup, sweating and constant movement.
Dr. Alicia Zalka, board-certified dermatologist and founder of Surface Deep, explains that the skin responds to all of that irritation by thickening and producing more pigment as a form of self-defense.
Dr. Marisa Ponzo, double board-certified dermatologist, echoes this. "Shaving, friction, and deodorants are the biggest culprits," she tells Parade. "Repeated inflammation leads to post-inflammatory hyperpigmentation."
The brightening skincare market has expanded well beyond the face, and there are now effective options designed specifically for underarm skin. The key is understanding which ingredients do the work, which ones to avoid and identifying and removing whatever is causing the irritation in the first place, because no brightening treatment will make lasting progress on skin that's still being stressed daily. So, here's how to get rid of dark armpits.
One important note before diving in: Dr. Viktoryia Kazlouskaya, owner of Dermatology Circle PLLC in NYC, and Dr. Maryam Zamani of Zamani Plastic Surgery, both flag that in some patients, underarm darkening may signal an underlying condition like acanthosis nigricans, which can be associated with insulin resistance or other metabolic disorders.
If your darkening seems sudden, extensive or is accompanied by velvety thickening of the skin, see a doctor before reaching for brightening products.
To find the best treatments, we talked to four dermatologists—Dr. Zalka, Dr. Ponzo, Dr. Kazlouskaya and Dr. Zamani—about what's actually driving underarm darkening and which products are worth your money.
Related: If You Skip Deodorant for a Week, Here’s What Happens to Your Body
Top Armpit Brightening Treatments
- Best Multitasking Armpit Brightening Treatment:CeraVe Skin Renewing Night Cream
- Best Armpit Brightening Serum:Eucerin Radiant Tone Dual Serum
- Best Armpit Brightening Deodorant:Dove Even Tone Antiperspirant
- Best Armpit Brightening Treatmentfor Sensitive Skin:AmLactin Daily Nourish Body Lotion
- Best Affordable Armpit Brightening Treatment:Olay Tone Correcting BHA and Vitamin C Body Wash
- Best Armpit Brightening Treatmentfor Dark Skin Tones:Nécessaire The Body Vitamin C-Radiance Serum
- Best Armpit Brightening Treatmentfor Travel:Surface Deep Pads
- Best Exfoliating Armpit Brightening Treatment:Glytone Enhance Brightening Serum
- Best Armpit Brightening Treatmentfor Post-Shave Darkening:La Roche-Posay Mela B3 Dark Spot Corrector
What Causes Dark Armpits?
Dark underarms are not a single condition—they're a symptom with multiple possible causes. "When the color becomes darker than usual or changes over time, it may be due to irritation from deodorants or antiperspirants, chronic friction, shaving habits, post-inflammatory hyperpigmentation or metabolic conditions," Kazlouskaya explains. "Because the treatment depends on the cause, it's best to see a board-certified dermatologist rather than simply trying to lighten the area."
Zalka explains that the skin responds to repeated irritation by thickening and producing extra pigment as self-protection—and the list of things that trigger that response is long.
Shaving, waxing, tight clothing, daily deodorant layering and sweating all contribute.
"The longer time spent being irritated, the more noticeable the darker color will be," she says.
Zamani adds that medium to deeper skin tones are particularly prone to developing discoloration after inflammation, since these skin types naturally produce more pigment in response to irritation.
What Ingredients To Look for in an Armpit Brightening Treatment
First things first: "Before reaching for brightening products, I recommend restoring the skin barrier with a gentle moisturizer and eliminating anything that may be causing irritation," Kazlouskaya tells Parade.
Once the skin is healthy, ingredients like lactic acid, kojic acid, vitamin C, azelaic acid, alpha-arbutin, niacinamide and thiamidol can gradually improve pigmentation while staying gentle on this sensitive area.
Ponzo adds that for more stubborn pigmentation, ingredients like hydroquinone or tretinoin may be appropriate under physician supervision.
What everyone agrees to avoid are fragrance, over-exfoliation and anything applied immediately after shaving when the barrier is already compromised.
Related: I Asked 3 Dermatologists Which Deodorant They Swear By—and They All Said the Same Thing
How Long Does It Take for Armpit Brightening Treatments To Work?
Zalka's optimistic estimate is two weeks once the cause is removed—but that assumes the irritation has been addressed.
Ponzo puts the timeline at four to eight weeks for initial improvement, with more noticeable results by eight to twelve weeks with consistent use. Kazlouskaya adds that "hyperpigmentation is notoriously slow to improve," noting that it may take longer when the discoloration is driven by hormonal or metabolic factors.
The consistent message across all four experts is that results require both the right products and removing the source of irritation. One without the other doesn't get you very far.
Can You Brighten Dark Armpits at Home?
Yes, for most cases. Kazlouskaya's at-home protocol is practical. Use a moisturizer containing ammonium lactate, avoid fragranced deodorants, minimize friction from shaving or tight clothing and consider speaking with a primary care physician about screening for insulin resistance if the darkening is new or accompanied by velvety texture changes.
Zamani adds that switching to fragrance-free deodorants, improving shaving technique and reducing friction can make a significant difference in preventing discoloration from recurring.
Are Armpit Brightening Treatments Safe?
Generally yes, with appropriate caution. "Patients with darker skin tones should be especially careful to avoid overly aggressive treatments, since excessive inflammation increases the risk of additional post-inflammatory hyperpigmentation," Zamani warns.
Kazlouskaya recommends starting slowly—applying products every other night and stopping if significant burning or irritation develops. And all four experts agree that stronger actives should never go on freshly-shaved skin.
Related: Doctors Are Begging You to Break This Super-Common Shower Habit ASAP
How To Get Rid of Dark Armpits: 9 Best Underarm Brightening Treatments
Here are the underarm brightening treatments recommended by dermatologists—including the most affordable option lower in the list, which can be used in the shower.
Best Multitasker: CeraVe Skin Renewing Night Cream, $22
Zalka loves this CeraVe Night Cream because it works for so many skin concerns—the formula addresses both the barrier damage and the pigmentation component of dark underarms.
She says it "soothes and brightens with ceramides and niacinamide.” A powerful combo! Plus, the overnight format means it has uninterrupted time to work without competing with deodorant, and it's widely available, well-priced and gentle on a sensitive area. It’s a win-win-win.
Best Serum: Eucerin Radiant Tone Dual Serum, $40
Kazlouskaya calls this one of her current favorite pigment-correcting products, and the star ingredient is thiamidol. "Thiamidol has excellent data for reducing hyperpigmentation while being gentler than many traditional lightening agents, making it suitable for most skin types," she says.
The hyaluronic acid in the formula supports barrier repair at the same time, which addresses both components of the darkening cycle simultaneously.
Best Brightening Deodorant: Dove Even Tone Antiperspirant, $9
Ponzo's pick solves the practical problem that most brightening routines ignore. If your daily deodorant is contributing to irritation and pigmentation, no serum is going to fully counteract what you're applying every morning.
This formula "helps prevent irritation while improving tone over time," she explains—meaning it works on the cause of darkening rather than just the symptom. Switching your everyday deodorant is one of the highest-leverage changes you can make.
Best for Sensitive Skin: AmLactin Daily Nourish Body Lotion, $12
Kazlouskaya recommends this as a first-line option specifically because it multitasks without irritating. "It hydrates while providing gentle exfoliation," she says. "It works gradually, but it's affordable, well tolerated and helps repair the skin barrier at the same time."
For sensitive underarm skin that reacts to stronger actives, the gentle lactic acid approach here is the place to start before introducing anything more targeted.
Best Affordable: Olay Tone Correcting BHA and Vitamin C Body Wash, $11
Zalka calls this cult-favorite beauty brand out in the best way for "starting armpit color correction in the shower." The BHA exfoliates while vitamin C works on pigmentation, and because it's a body wash, it integrates into a step you're already doing daily without adding anything to your routine.
For anyone overwhelmed by the idea of a dedicated underarm skincare routine, this is the most accessible entry point.
Best for Dark Skin Tones: Nécessaire The Body Vitamin C-Radiance Serum, $62
Zamani emphasizes that deeper skin tones require particular care with brightening treatments, since aggressive ingredients can trigger additional post-inflammatory pigmentation rather than reducing it.
A well-formulated vitamin C serum like this one addresses hyperpigmentation through antioxidant activity rather than direct irritation, making it a safer choice for skin that's already prone to inflammation-driven darkening. Zalka also calls it out for its "luxury and lightening" combination.
Best for Travel: Surface Deep Pads, $22
This one is Zalka's own formula, and the format earns its place as the overall travel pick because it solves multiple problems in one swipe. The pre-soaked pad removes residue and product buildup from other deodorants while depositing glycolic acid to exfoliate and postbiotic ferments to soothe.
These pads "swipe away residue from other products, exfoliate and brighten with glycolic, soothe with postbiotic ferments," she explains. For underarm skin that has been layered with products daily for years, clearing the decks before brightening is half the battle.
Best Exfoliant: Glytone Enhance Brightening Serum, $79
Kazlouskaya's exfoliant pick combines kojic acid and azelaic acid, a pairing she finds "very effective for post-inflammatory pigmentation." Because the underarms are sensitive, she recommends introducing it slowly and reducing frequency if irritation occurs.
Ponzo also recommends azelaic acid formulas specifically for stubborn pigmentation, noting that it "targets melanin production for more resistant dark spots."
Best for Post-Shave Darkening: La Roche-Posay Mela B3 Dark Spot Corrector, $45
Both Zalka and Zamani reach for this one, and shaving-related darkening is the specific use case it was built for. Zamani appreciates that it "focuses on correcting uneven pigmentation while remaining gentle enough for many people with sensitive skin."
Zalka's recommendation is similarly concise: "Nothing harsh, just helps dark marks," she says—which is exactly the brief for skin that's already been through the repeated micro-trauma of regular shaving.
Up Next:
Sources:
- Dr. Alicia Zalka, board-certified dermatologist and founder of Surface Deep
- Dr. Marisa Ponzo, double board-certified dermatologist
- Dr. Viktoryia Kazlouskaya, owner of Dermatology Circle PLLC, NYC
- Dr. Maryam Zamani, aesthetic physician
