The prevalence of psoriasis -- a chronic, inflammatory disease of the skin -- is significantly higher among overweight and obese kids, researchers have found. The Kaiser Permanente study, published online in the Journal of Pediatrics, also found that teens with psoriasis (regardless of their body weight) have higher cholesterol levels, putting them at greater risk for heart disease. “This study suggests a link between obesity and psoriasis in children,” the study’s lead author Corinna Koebnick, research scientist at the Kaiser Permanente Southern California’s Department of Research & Evaluation, said in a Kaiser Permanente news release.