Main Causes and Treatments for Your Dark Underarms

Ideally, your underarms should be the same color as the rest of your skin. However, this sensitive area can turn into a darker shade, which can greatly affect your confidence.

Although having dark underarms is usually not a sign of concern, this condition can greatly affect your confidence, especially during hotter days. Because of your dark underarms, you might not have the self-esteem to wear sleeveless shirts and even swimsuits.

What Causes Dark Underarms?

The main reason for the darkening of your skin, particularly your underarms, is a skin condition called acanthosis nigricans (AN). This skin problem often causes the skin to darken and thicken in the following areas:

  • Armpits
  • Back of the neck
  • Elbows
  • Knees
  • Groin

AN can also cause you to experience itchiness and foul odor in these parts of your body. Although this is a quite common condition, some people are still more predisposed to AN due to their race, health, and genetics. Here are some of the factors that can cause you to be more prone to developing AN:


Heavier people are often more resistant to the effects of insulin, a hormone that regulates the sugar levels in your blood. If you have an excess amount of insulin in your blood, you are more susceptible to the increased production of melanin, which turns your skin a darker color.

Hormonal Disorders

People with endocrine conditions also often deal with AN. Most of the time, people with any of these hormonal disorders develop dark underarms:

  • Polycystic ovary syndrome (PCOS)
  • Cushing syndrome
  • Acromegaly
  • Hypothyroidism


Aside from the medical conditions discussed above, AN can be caused by particular drugs and supplements that you are taking. Some of the medications linked to having darker underarms are the following:

  • High-dose niacin
  • Birth control pills
  • Corticosteroids
  • Insulin

Treatments for Your Dark Underarms

The main treatment you can do for your dark underarms caused by AN is to focus on the underlying issue. However, you can also tweak your skin care routine and start using effective underarm whitening products:

Step 1: Exfoliate your skin using Gluta-C’s Intense Whitening Body Scrub. This non-abrasive product contains natural papaya enzymes, which gently lightens your skin as you exfoliate.

Step 2: After exfoliating and cleansing your skin, make sure to use a gentle deodorant that will keep you smelling fresh without damaging your complexion. One product you can use is Gluta-C’s Intense Whitening Deodorant. This product is alcohol- and paraben-free, making it ideal for the sensitive skin of your underarms.

Step 3: Aside from exfoliating and using a mild deodorant, you should actively lighten your dark underarms using Gluta-C’s Underarm and Bikini Whitening Gel. This product contains Glutathione, Vitamin C, and Daisy Flower Extract, which work together in effectively lightening your sensitive areas.

Regain Your Self-Esteem and Raise Your Underarms

Manage the effects of AN on your underarms and have the confidence to wear whatever you want once again. Whether you decide to use OTC products or work with a professional, you deserve smooth, light armpits that you can flaunt anytime.

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