Knowing what type of psoriasis you have can help you and your doctor come up with an effective treatment plan.Your physician can usually diagnose the form based on your symptoms and a careful skin examination. But a biopsy is sometimes needed for confirmation.Most people have just one kind of psoriasis. However, you can develop a new type of the skin disorder at any time.
Plaque psoriasis, which is also called psoriasis vulgaris, is the most common type.Between 80 percent and 90 percent of people with psoriasis skin disease have this form, according to the American Academy of Dermatology.If you have plaque psoriasis, you might notice raised, red patches of skin that are covered with a silvery scale.These raised patches, known as plaques, can crop up on any area of the body but are commonly found on the knees, elbows, scalp, or lower back.
The plaques can cause:
Guttate psoriasis is the second most common type.It affects about 10 percent of people with psoriasis, according to the National Psoriasis Foundation (NPF).Guttate psoriasis, from the Latin for “raindrop shaped,” causes small, dot-like spots on the body. These pinkish, red lesions frequently appear on the upper arms, trunk, thighs, or scalp.Often, this form of psoriasis skin disease first starts in childhood or young adulthood.Guttate psoriasis can be triggered by a strep infection, tonsillitis, stress, a skin injury, or certain medication (such as beta-blockers). Sometimes genetic factors are to blame.This type of psoriasis may clear up without any treatment. But certain cases require medical therapy. In some patients, it presents as a single episode, but in others it may signal the start of plaque psoriasis.