Psoriasis at a Glance

About 3 percent of Americans have a long-lasting skin disease called psoriasis. It’s characterized by patches of inflamed, scaly skin, which usually feel itchy or painful. The look of these patches varies, depending on the type of psoriasis you have. The patches can occur on the arms, legs, trunk, scalp, palms, soles of the feet, genitals, and even inside of the mouth. The nails and joints are sometimes affected as well.

Medically Reviewed By: Haines, Cynthia MD | Last Review Date: Nov 10, 2012

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Medical References

  1. Psoriasis and Psoriatic Arthritis, American Academy of Dermatology, 2010 (http://www.aad.org/public/publications/pamphlets/common_psoriasis.html);
  2. Psoriatic Arthritis, Arthritis Foundation, 2010 (http://www.arthritis.org/disease-center.php?disease_id=21&df=definition);
  3. Questions and Answers About Psoriasis, National Institute of Arthritis and Musculoskeletal and Skin Diseases, April 2009 (http://www.niams.nih.gov/Health_Info/Psoriasis/default.asp);
  4. Guttate Psoriasis, National Psoriasis Foundation (http://www.psoriasis.org/NetCommunity/Document.Doc?id=522);
  5. Pustular Psoriasis, National Psoriasis Foundation (http://www.psoriasis.org/NetCommunity/Document.Doc?id=524);
  6. Types of Psoriasis, National Psoriasis Foundation, 2010 (http://www.psoriasis.org/netcommunity/learn/about-psoriasis/types);
  7. Frequently Asked Questions About Psoriatic Arthritis, National Psoriasis Foundation, 2010 (http://www.psoriasis.org/netcommunity/sublearn02_psa_faq);
  8. Psoriatic Nails, American Academy of Dermatology, 2010 (http://www.skincarephysicians.com/psoriasisnet/psoriatic_nails.html);
  9. Scalp Psoriasis, American Academy of Dermatology, August 18, 2010 (http://www.skincarephysicians.com/psoriasisnet/scalp_psoriasis_overview.html);
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