Do I need to worry about that weird stuff in my belly button?

Is your belly button basically a tiny armpit? What’s actually in belly button lint? How does it even get there? Do you need to worry about it?

Glad you asked, because there’s a remarkable amount of science devoted to the lint that lurks in our belly buttons. And here to guide you through it is Dr. Trisha Pasricha, a physician at Beth Israel Deaconess Medical Center, an assistant professor of medicine at Harvard Medical School and The Washington Post’s Ask a Doctor columnist.

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