The most common type of psoriasis is plaque psoriasis, per the Mayo Clinic. It appears as raised, red patches with a silvery-white coating of dead skin cells, and is most often found on the scalp, elbows, knees, lowers back, and genitals, but it can show up anywhere on your body. Unfortunately, the patches may be painful and itchy and are liable to cracking and bleeding.
There are other, less common forms of psoriasis. Guttate psoriasis, which often begins in childhood or young adulthood and can be triggered by a strep infection, appears as small, droplike lesions. Inverse psoriasis shows up as a smooth, shiny, red rash in body folds, such as under the arms or breasts. Pustular psoriasis, which can present on the palms of the hands and soles of the feet, is characterized by noninfectious, pus-filled blisters, according to John Hopkins Medicine. The most severe, and rarest, type of psoriasis is erythrodermic psoriasis, which results in widespread, fiery redness over most of the body. It can cause severe itching and pain, and if you think you’re having an erythrodermic psoriasis flare-up, you should seek medical attention immediately.