This Is What Causes Whiteheads—and How to Treat Them

What is a whitehead?

Identifying a whitehead is the first step to treating one. The tell is a small white bump that occurs when trapped oil, bacteria and dead skin cells clog a pore, says David Lortscher, MD, a dermatologist and CEO of telemedicine service Curology.

Overexposure to the sun is also a major cause of blackheads and whiteheads, he says. By avoiding clogged pores, being cautious of sun-exposure, and using sunscreen, you can prevent them.

Try these vitamins for clearer, healthier skin.

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