Erythrodermic psoriasis is an uncommon, aggressive, inflammatory form of psoriasis. Symptoms include a peeling rash across the entire surface of the body. The rash can itch or burn intensely, and it spreads quickly. Erythrodermic psoriasis is one of the most severe types of psoriasis. If complications develop, it can be life-threatening. The condition most often affects people who already have unstable plaque psoriasis. It can also occur at the onset of an episode of plaque psoriasis or alongside another rare type of psoriasis called von Zumbusch pustular psoriasis.