Dark Underarms? Here Are the Causes and Natural Ways to Brighten Them

Dark underarms are a common concern that can make some people feel self-conscious.

The darkened skin in this area can be caused by several factors, such as friction, buildup of dead skin cells, use of certain deodorants, or medical conditions like diabetes and obesity.

Fortunately, dark underarms can be treated with the right care. Some natural ways to help brighten the area include:

• Moisturizing regularly to prevent dryness and irritation.
• Applying topical creams containing brightening ingredients such as niacinamide or liquorice extract.
• Undergoing laser therapy to reduce excess pigmentation.
• Using natural ingredients like lemon juice or aloe vera to help gradually brighten the skin.

Caring for dark underarms requires patience and consistency, but with time, you can achieve smoother, brighter, and healthier-looking skin.

Causes of Dark Underarms You Should Know

Dark underarms can be triggered by a range of factors, from medical conditions to daily habits. Here are some of the most common causes:

1. Medical Conditions

Certain conditions, such as insulin resistance and obesity, can cause darkening of the skin, especially in areas like the underarms.

In people with type 2 diabetes, the skin may react to insulin sensitivity, leading to pigment buildup in body folds, including the underarms.

2. Hormonal Changes

Hormonal fluctuations also play a significant role in underarm darkening.

Those with thyroid disorders, polycystic ovary syndrome (PCOS), or other hormonal imbalances are more prone to this condition.

Changes in hormone levels during puberty or pregnancy can trigger melasma, a type of hyperpigmentation caused by excess melanin production, which can also appear under the arms.

3. Frequent Shaving

Improper shaving techniques can irritate the skin and cause inflammation, leading to post-inflammatory hyperpigmentation.

Additionally, darker hair beneath the skin’s surface can make the underarms appear darker.

4. Deodorant Irritation

Certain deodorants or antiperspirants can irritate the underarm skin. Rather than causing rashes, the irritation often leads to darkening.

To prevent this, choose natural deodorants with minimal irritants such as glycerin and avoid those with harsh chemicals or baking soda.

5. Buildup of Dead Skin Cells

Accumulated dead skin cells can make the underarms appear dull and dark.

Regular exfoliation with gentle scrubs or body exfoliators helps remove dead skin cells and naturally brighten the area.

Safe and Natural Ways to Lighten Dark Underarms

Dark underarms can affect confidence, especially when wearing sleeveless outfits. Fortunately, there are safe and effective ways to brighten them naturally:

1. Moisturize Regularly

Dry underarms that experience friction are more prone to darkening.

Apply a fragrance-free moisturizer after shaving to prevent irritation and keep the skin soft.
Tip: Always use shaving cream or foam before shaving, especially if you have sensitive skin.

2. Reduce Shaving or Plucking Frequency

Frequent shaving can cause micro-inflammation that triggers hyperpigmentation.

Consider gentler hair removal methods, such as waxing or laser treatment, to minimize irritation and achieve smoother results.

3. Use Natural Brightening Ingredients

Some natural ingredients may help fade dark underarms, although evidence is still limited. You can try:

• Turmeric: Curcumin helps inhibit excess melanin production.
• Lemon: Acts as a natural lightening agent, but use sparingly as it can increase skin sensitivity.
• Sea cucumber extract: Contains natural collagen that supports skin regeneration.

4. Choose Gentle Deodorants

Avoid deodorants containing alcohol or strong fragrances, as these can irritate and darken the skin.

Look for products with soothing ingredients such as glycerin, aloe vera, or vitamin E.

If you sweat heavily, opt for antiperspirants that reduce perspiration.

Apply antiperspirant after bathing and before bedtime, making sure your underarms are dry for best results.

5. Exfoliate Regularly

Dead skin buildup can cause dull, dark underarms.

Gently exfoliate once or twice a week with a mild, natural scrub to remove dead skin cells and promote a smoother, brighter appearance.

With consistent care and the right products, you can naturally brighten your underarms without irritation.

Choosing the Right Underarm Care Product

• Deodorant: Helps control odor by reducing bacteria and masking smell. Suitable if you don’t sweat excessively but struggle with body odor.
• Antiperspirant: Blocks sweat glands to reduce perspiration.
• Combination deodorant–antiperspirant: Ideal for those who both sweat heavily and experience strong body odor.
• Prescription-strength antiperspirant/deodorant: Recommended if over-the-counter products don’t provide adequate results.

References

Medical News Today. Accessed in 2025. What causes armpit discoloration, and how to get rid of it

Vinmec. Accessed in 2025. Darkened, itchy underarms: Causes and remedies