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Psoriasis: Test Your Knowledge

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Psoriasis affects up to 7.5 million Americans, according to the National Institutes of Health. Psoriasis is more common in adults than children and affects males and females equally.

Psoriasis affects:

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Psoriasis in Fall and Winter: 7 Answers to Frequently Asked Questions

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Read the Psoriasis in Fall and Winter: 7 Answers to Frequently Asked Questions article > >

  • 2% to 3% of people throughout the world
  • About 2.2% of people in the United States
  • Some cultures more than others. Worldwide, psoriasis is most common in Scandinavia and other parts of northern Europe. It appears to be far less common among Asians and is rare in Native Americans, according to the American Academy of Dermatology.

WebMD Medical Reference

Reviewed by Norman Levine, MD on October 31, 2012

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