Why Are My Armpits Dark?
Dark armpits are often caused by a skin condition called acanthosis nigricans. This condition causes a darkening and thickening of the skin in body folds, commonly affecting the armpits, groin, and neck. It's frequently associated with underlying medical conditions like diabetes and obesity. The darkening itself is usually not a cause for concern, but it's important to address any potential underlying health issues.
Several factors can contribute to darkened underarms:
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Acanthosis Nigricans: As mentioned, this is a common cause. The Mayo Clinic describes acanthosis nigricans as causing "a dark discoloration in body folds and creases." https://www.mayoclinic.org/diseases-conditions/acanthosis-nigricans/symptoms-causes/syc-20368983 The NHS also notes that it "could be a sign of an underlying condition." https://www.nhs.uk/conditions/acanthosis-nigricans/
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Post-inflammatory Hyperpigmentation (PIH): This occurs when skin inflammation or damage, perhaps from irritation caused by deodorant or other products, leads to a darkening of the skin. https://hoodermatology.com/blogs/articles/dark-underarms-causes
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Hyperpigmentation: This is a harmless condition where skin becomes darker than surrounding skin. https://www.barbaskinclinic.com/blog/ask-the-skincare-expert-why-are-my-underarms-so-dark/
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Accumulation of Dead Skin Cells: The underarm area's unique folded nature can trap dead skin cells, contributing to darkening. https://duradry.com/blogs/hyperhidrosis/what-are-the-causes-of-dark-underarms-and-its-treatments
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Underlying Medical Conditions: Cleveland Clinic emphasizes the potential link between dark underarms and diabetes. https://health.clevelandclinic.org/how-to-get-rid-of-dark-armpits
Important Note:
While dark underarms are often harmless, it's crucial to consult a doctor if you notice a sudden change in underarm color or if it's accompanied by other symptoms. Early detection of underlying medical conditions is essential.
