Itchy, irritated armpits? You're not alone. It's a complaint that dermatologists hear often. That's because the armpit, also known as the axilla, is notoriously prone to irritation and other issues.

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Journalist Annie Lowrey has a rare disease that causes a near-constant itch that doesn't respond to most treatments. She likens the itchiness to a... Chronic itch is miserable. Scientists are just ...