Slide show: Types of psoriasis
Image of plaque psoriasis
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Plaque psoriasis, the most common form of psoriasis, causes dry, raised, red skin lesions (plaques) covered with silvery scales. The plaques itch or may be painful and can occur anywhere on your body. You may have just a few plaques or many, and in severe cases, the skin around your joints may crack and bleed.

Lifestyle measures, such as using a nonprescription cortisone cream and exposing skin to small amounts of natural sunlight, may improve mild cases. Moderate or severe cases may require light therapy, prescription steroid creams, topical tar preparations, oral medications or a combination of these. Severe cases that don't respond to any of these can be treated with newer medications, most often given by injection, aimed at reducing specific types of inflammation.

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