Psoriasis (IMAGE) National Psoriasis Foundation Caption Psoriasis is a chronic, noncontagious, genetic disease of the immune system that appears on the skin, most often as red, scaly patches that itch and bleed. Psoriasis is the most common autoimmune disease in the country, affecting 7.5 million Americans. People with psoriasis are at increased risk for heart disease, heart attack, stroke, diabetes, obesity and depression. Up to 30 percent of people with psoriasis develop psoriatic arthritis, an inflammatory arthritis that affects the joints and tendons. If left untreated, psoriatic arthritis can be disabling. Six grants were awarded by the National Psoriasis Foundation, totaling $450,000, to study more about the causes of psoriatic diseases to find better treatments and ultimately a cure. Credit Copyright National Psoriasis Foundation 2013 Usage Restrictions Must include the following photo credit: Copyright National Psoriasis Foundation 2013 License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.