This type is the least common, but it's very serious. It affects most of your body and causes widespread, fiery skin that appears burned. You might also have:
Severe itching, burning, or peeling
A faster heart rate
Changes in body temperature
If you have these symptoms, see your doctor right away. You may need to get treated in a hospital. This type of psoriasis can cause severe illness from protein and fluid loss. You may also develop an infection, pneumonia, or congestive heart failure.
Suddenly stopping your systemic psoriasis treatment
An allergic drug reaction
Medications such as lithium, anti-malarial drugs, cortisone, or strong coal tar products
Erythrodermic psoriasis may also happen if your psoriasis is hard to control.