Psoriasis is a common skin disease that affects between five and seven million Americans and lives through the life cycle of skin cells. These skin cells build up rapidly and once they reach the epidermis, or outer layer of the skin, forming thick silvery scales and itchy, red spots and dry, often painful.Psoriasis is a persistent, long-term ( chronic), and there may be times when the psoriasis is worse than others, but always comes back.For some psoriasis, is a nuisance, but for most patients, which is debilitating. Very often, psoriasis also cause arthritis in small joints of the hands and feet, causing difficulty walking or doing anything without pain.There no cure, only drugs that can help or relieve arthritis and pain is not a new

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About the Author:
I am Paulsimmions read mathematics at Stanford and remained there for his MS. From 1998-1999 on researched in Evolution and in Animal Behavior in Camrbidge, UK. I was was then a professor in the departments of Anthropology and Biology, New Jersy College, USA. Now teaches at the department of Zoology. Carried out research in several areas of evolutionary biology, particularly in sexual selection and the comparative method.

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