Fast Facts about Psoriasis

Roughly 210 million people suffer from psoriasis worldwide (i.e., 3% of the world's population). Dr. Greene explores psoriasis facts.


Psoriasis is often not even considered in children because the average age of onset is 28 years.

Roughly 210 million people suffer from psoriasis worldwide (i.e., 3% of the world’s population)[1]; approximately 7.5 million people suffer from psoriasis in the United States.

According to the National Psoriasis Foundation, between 150,000 and 260,000 new cases are identified each year in the United States.

10% to 20% of people with psoriasis also experience the swollen hands and feet of psoriatic arthritis.[2]

People with severe psoriasis have a 50% increased risk of mortality. Patients with severe psoriasis die 3.5-4.4 years younger than patients without psoriasis.[3]

In the United States, $11.25 billion is spent on psoriasis every year.[4]

For children whose psoriasis is triggered by throat infections, or made worse following strep or impetigo, tonsillectomy and adenoidectomy may be an option.[5]

People who bathe in the salt water of the Dead Sea in natural sunlight have been noted to have dramatic improvement of their psoriasis.


[1] Journal of Investigative Dermatology (2013) 133, 377–385; doi:10.1038/jid.2012.339; published online 27 September 2012
[3] Gelfand JM, Troxel AB, Lewis JD, et al. The risk of mortality in patients with psoriasis: results from a population-based study. Arch Dermatol. 2007;143:1493—9.
[5] J Immunol. 2012 May 15;188(10):5160-5. doi: 10.4049/jimmunol.1102834. Epub 2012 Apr 9.
Last medical review on: June 29, 2014
About the Author
Photo of Alan Greene MD
Dr. Greene is a practicing physician, author, national and international TEDx speaker, and global health advocate. He is a graduate of Princeton University and University of California San Francisco.
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