The most common form of psoriasis is called plaque psoriasis. It is characterized by lesions that have a reddened base covered by silvery scales. It most often occurs on the elbows, knees, scalp, lower back, face, palms and the soles of the feet. It is often set off by bacterial infections. It most often shows up on the torso, limbs and scalp.
Pustular psoriasis is blisters that can leak.
Inverse psoriasis most often appears in the folds of the skin near the genitals, under the breasts or in the arm pits. The outbreak is usually intensely red and inflamed. It will be sensitive to sweating or friction. Erythrodermic psoriasis is widespread reddening and scaling of the skin that is itchy or painful. It is often preceded by another insult to the skin such as a sunburn or a drug related rash.