A Look at Psoriasis Severity

More Common Than You Might Think

In the United States alone, about 7.5 million people have psoriasis. The most common type, which affects about 80% of people with the condition, is plaque psoriasis. Like rheumatoid arthritis and multiple sclerosis, psoriasis is an autoimmune disease that isn't well-understood.

Medically Reviewed By: Jones, Niya, MD | Last Review Date:

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Medical References

  1. About Psoriasis, National Psoriasis Foundation, accessed Aug. 9, 2012 (http://www.psoriasis.org/about-psoriasis);
  2. Psoriasis Causes and Known Triggers, National Psoriasis Foundation, accessed Aug. 9, 2012 (http://www.psoriasis.org/about-psoriasis/causes);
  3. Moderate to Severe Psoriasis: Biologic Drugs, National Psoriasis Foundation, accessed Aug. 9, 2012 (http://www.psoriasis.org/about-psoriasis/treatments/biologics);
  4. Psoriasis Severity, National Psoriasis Foundation, accessed Aug. 9, 2012 (http://www.psoriasis.org/about-psoriasis/treatments/severity);
  5. Types of Psoriasis, National Psoriasis Foundation, accessed Aug. 9, 2012 (http://www.psoriasis.org/about-psoriasis/types);
  6. Psoriasis and Mental Health Issue Brief, National Psoriasis Foundation, January 2012, accessed Aug. 9, 2012 (http://www.psoriasis.org/document.doc?id=350);
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