What Do Dark Underarms During Pregnancy Mean?

Pregnancy brings about numerous changes in a woman’s body, some expected, like weight gain and morning sickness, and others more surprising, such as darkening underarms.

While this may seem alarming at first, many pregnant women notice their underarms becoming darker, especially during the second trimester. Understanding why this happens, whether it’s normal, and how to treat it can help ease concerns.

Let's explore the causes, effects, and treatment options for dark underarms during pregnancy.

Why Do Armpits Get Dark During Pregnancy?

The darkening of underarms during pregnancy is primarily due to increased hormone levels, particularly estrogen and progesterone. These hormones play a critical role in supporting the growth and development of the baby, but they can also have side effects on the mother's body.

One of these side effects is the overproduction of melanin, the pigment responsible for the color of the skin. When melanin production increases, areas of the skin, especially those prone to friction like the underarms, may become darker. This condition is known as hyperpigmentation [*].

In addition to hormonal changes, other factors can contribute to the darkening of the skin, including:

• Genetics: Some women are more predisposed to hyperpigmentation based on their family history and skin type. Those with darker complexions may notice more pronounced pigmentation changes during pregnancy [*].
• Environmental factors: Sun exposure, in particular, can also exacerbate the darkening of the skin. While this can be disconcerting, it is a common occurrence and a normal response to the body's hormonal fluctuations during pregnancy.

Are Dark Underarms During Pregnancy Normal?

Yes, dark underarms during pregnancy are entirely normal. The phenomenon of darkened skin, known medically as melasma or chloasma, is not limited to the underarms and can appear in other areas of the body such as the neck, face, and inner thighs [*].

For many women, the changes in pigmentation begin in the second trimester, when hormone levels are particularly high. This occurrence is widespread, affecting more than 70% of pregnant women, making it a common feature of pregnancy-related skin changes [*].

A common myth associated with pigmentation changes is that they indicate the gender of the baby. Some believe that darker underarms may signify a particular gender, but there is no scientific evidence to support this claim.

The darkening of the skin has nothing to do with whether you are having a boy or a girl. Rather, it is a response to the hormonal shifts your body undergoes during pregnancy.

Do Dark Armpits Go Away After Pregnancy?

For most women, the darkening of the underarms is temporary and will gradually fade after childbirth. Once hormone levels return to their pre-pregnancy state, melanin production typically decreases, allowing the skin to return to its usual tone. This process can take a few months, but it varies from person to person [*].

Some women may experience quicker lightening, while others might notice the dark patches lingering for longer, especially if they are breastfeeding. Breastfeeding prolongs hormonal fluctuations, which can delay the fading process [*].

If you are concerned that your dark underarms are taking longer than expected to return to normal, it may be helpful to consult a dermatologist. In some cases, topical treatments or light therapy may be recommended to help expedite the process. It’s important to remember, however, that patience is key — hyperpigmentation is generally a temporary issue, and the skin will often recover naturally over time.

How to Treat Dark Underarms During Pregnancy

While dark underarms during pregnancy are natural, there are safe ways to manage or reduce their appearance. It’s crucial to choose treatments that are safe for both you and your baby.

Below are some pregnancy-friendly treatments for dark underarms:

1. Natural Lightening Remedies

Lemon juice is a popular natural remedy due to its high vitamin C content, which has brightening properties. Applying fresh lemon juice to the affected area for 10–15 minutes before rinsing off may gradually lighten darkened skin [*]. However, be cautious with lemon juice, as it can cause irritation for some, especially if your skin is sensitive.

Another option is aloe vera gel, which is known for its soothing and hydrating properties. Applying aloe vera daily can help reduce pigmentation while keeping the skin moisturized [*].

2. Gentle Exfoliation

Exfoliating can help remove dead skin cells and promote the regeneration of new skin, which may reduce the appearance of dark patches. A mild, pregnancy-safe exfoliant, such as a sugar or oatmeal scrub, can be used once or twice a week.

Be gentle when exfoliating, as aggressive scrubbing can irritate sensitive skin and make hyperpigmentation worse [*].

3. Pregnancy-Safe Topical Creams

Many skincare products that target hyperpigmentation contain harsh ingredients such as hydroquinone or retinoids, which are not recommended during pregnancy. Instead, opt for creams containing pregnancy-safe ingredients like vitamin E or licorice extract, both of which are known to help brighten skin [*].

As always, consult with your doctor before starting any new skincare routine during pregnancy to ensure it’s safe for you and your baby.

Caring for Underarms During Pregnancy

In addition to specific treatments, incorporating good skin care habits into your routine can help manage dark underarms during pregnancy. The following tips can keep your skin healthy and reduce the risk of further pigmentation [*]:

• Wear breathable fabrics: Opt for breathable, natural fabrics like cotton to reduce friction and sweating, both of which can contribute to darkened underarms. Tight-fitting clothes can increase irritation, so choose loose, comfortable attire to keep your skin happy.
• Shave with care: If you shave your underarms, use a clean, sharp razor to minimize irritation, and always moisturize afterward with a gentle, pregnancy-safe lotion. Shaving can cause irritation, and irritated skin is more prone to darkening, so it’s important to be cautious.
• Stay hydrated: Drinking plenty of water is essential for maintaining healthy, hydrated skin. Well-hydrated skin is better able to heal and regenerate, which may help reduce pigmentation over time.
• Use mild deodorants: Some deodorants contain harsh chemicals and fragrances that can irritate the skin, making hyperpigmentation worse. Switch to a mild, alcohol-free deodorant that is gentle on sensitive skin.

The Bottom Line

Dark underarms during pregnancy are a common and normal occurrence, caused by hormonal fluctuations that lead to increased melanin production. While it can be concerning to notice changes in your skin tone, it is a temporary issue for most women.

As hormone levels stabilize after pregnancy, the dark patches typically fade away. In the meantime, with gentle skincare practices and pregnancy-safe treatments, you can manage the appearance of dark underarms and keep your skin healthy.

About MiracleCord

At MiracleCord, we are dedicated to providing expectant parents with the highest level of care and support when it comes to preserving their newborn's cord blood. Cord blood banking offers a valuable opportunity to safeguard your family's future health by storing stem cells that may be used in medical treatments.

We understand that pregnancy comes with many physical and emotional changes, and our team is here to guide you through the process in a supportive and understanding environment. From answering your questions about cord blood banking to helping you make informed decisions for your family’s well-being, we are committed to empowering you every step of the way.

The process is simple and affordable when you choose a reputable cord blood bank like MiracleCord. Still have questions? Give us a call at 888.743.2673.

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