Definition – The Five Types of Psoriasis

Plaque Psoriasis

This is the most common and recognized form of psoriasis. Plaque psoriasis causes the dry and raised red skin that most people identify with the disease. These red lesions or “plaques” are often covered with silvery scales and are circular to oval in shape. Plaque psoriasis can occur anywhere on the body and can itch or even be painful in severe cases. Plaque psoriasis can even be found on the genitals and on the soft tissue inside your mouth. Since plaque psoriasis is commonly found on the elbows and knees, the area around the joints may crack and bleed due to the severe dryness.

Guttate Psoriasis

Guttate Psoriasis is the second most common form of psoriasis. The lesions associated with guttate psoriasis are normally small and are either round or tear drop in shape. Guttate psoriasis is usually found in younger individuals and is often brought on by a bacterial infection such as strep throat. The sores associated with this type of psoriasis are not as thick as with plaque psoriasis and are not as scaly. Guttate psoriasis may go away on its own as soon as the infection is gone. Typically guttate psoriasis occurs on the trunk, arms or legs. However, it may also cover a large portion of the body.

Inverse Psoriasis

This form of psoriasis mainly occurs in areas where the skin overlaps. Common areas are the armpits, under the breasts, in the groin area and around the genitals. Friction and sweat can often make this form of psoriasis worse. Inverse psoriasis usually appears as smooth red patches that may be inflamed or irritated. This type of psoriasis is more common in overweight individuals. The overgrowth of yeast may actually trigger the skin lesions of this type of psoriasis.

Pustular Psoriasis

This form of psoriasis is uncommon and makes up only a small percentage of all the reported cases. Pustular psoriasis comes on quickly. Pus-filled blisters can appear within hours and the skin will be red and irritated. These blisters often come in cycles. They will dry and disappear after a day or so and then reappear in a few days. This is one form of psoriasis in which additional side effects such as fever, fatigue, chills and itching can occur. Pustular psoriasis can appear in small areas on the hands and feet or can be wide spread over large areas of the body.

Erythrodermic Psoriasis

This is probably the rarest form of psoriasis but can be quite serious. In most cases it will cover an entire body with a red rash that will peel, itch and burn. The increased blood flow to the psoriasis areas can put a strain on the heart. It is believed that Erythrodermic psoriasis can be brought on by severe sunburn or certain types of medications. Sometimes other forms of psoriasis can turn into erythrodermic psoriasis if they are not kept under control.

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