Erythrodermic psoriasis is caused by the incorrect treatment of psoriasis, such as the use of hormonal drugs in the acute phase of common psoriasis or the prolonged use of large amounts of corticosteroids. Erythrodermic psoriasis has some distinctive features. There are four main characteristics of erythrodermic psoriasis: 1. erythrodermic psoriasis will appear flushed at the location of previous psoriasis lesions and will soon spread into a large area, and the patient’s whole body will eventually appear diffuse flushed infiltration. 2, erythrodermic psoriasis patients in the onset of time, basically every day will shed a large number of scales, scalp will also accumulate a thick scaly crust. Later in the disease, the patient’s hands and feet will also appear a large area of skin peeling. 3. The nails of patients will become cloudy, thick and deformed, and the nails will eventually fall off naturally. The patient’s mouth, pharynx and nasal cavity, and even the conjunctiva of the eyes may become congested and red. 4. The superficial lymph nodes of patients with erythrodermic psoriasis will become enlarged and the number of white blood cells will increase. This disease is stubborn in nature, and relapses may occur even after it is cured in time. The psoriasis patient’s body will also slowly become weakened. So, erythrodermic psoriasis will not be non-contagious? 1, psoriasis disease does not have the conditions for contagion to occur. According to years of tracking research by psoriasis experts: psoriasis is a stubborn skin disease, but its pathogenesis has nothing to do with infectious factors – bacteria, fungi, parasites, etc. It can be seen that psoriasis disease does not have the conditions for contagion to occur. 2, psoriasis is not contagious this view is currently no one in the medical community to dispute. And the medical profession has conducted some experiments, such as moving psoriasis lesions on the skin of healthy people, but at this time there is no psoriasis contagious phenomenon, it can be seen that psoriasis is not contagious is supported by medical experiments, with scientific. 3, from the clinical practice observation psoriasis also does not exist infectious. Experts have followed up and investigated nearly a thousand patients, especially between couples with psoriasis, and no cases of transmission between couples were found. Some psoriasis patients have lived with their other half for more than 20 years without transmitting the disease to the other person, which can fully explain that psoriasis disease is not contagious among the population.