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What causes dark underarm skin?

Audrey Kunin, MD
Dermatology
It is incredible how common and how embarrassing underarm skin discoloration is, especially for those with naturally deeper skin tones. Causes include eczema, irritating ingredients found in deodorants and antiperspirants, a predilection to eczema or diabetes (acanthosis nigricans), as well as friction triggered by movement and activity. No matter the cause, ultimately inflammation leads to the development of skin discoloration. Make certain your antiperspirant is a water-based roll-on free of fragrance and dyes.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.