That means more medications are required to control it.
That's the finding of a new study in PLoS ONE.
About 4 percent of the population has psoriasis which causes itchy, thickened, dry red patches on the skin.
This study also found hypertensive patients were also nearly 20 times more likely to be on four drugs.
Authors of the study say their findings are significant and show that psoriasis is not just a skin deep disease. They believe it may represent a window into detecting cardiovascular conditions.