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Psoriasis is typically diagnosed after the physician does a physical exam. The doctor generally can recognize psoriasis by observing the appearance of the diseased skin.
Although usually not necessary, skin biopsies can support the diagnosis of plaque psoriasis in difficult cases although they are not always definitive. There may be a lot of overlap between the biopsy appearance of a plaque of psoriasis and that of a plaque of lichen simplex chronicus, which occurs when skin is chronically rubbed or scratched for any reason. Psoriasis of the hands and feet (palmoplantar psoriasis) may appear identical to chronic contact dermatitis on biopsy.
Psoriasis Home Remedies
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Medically Reviewed by a Doctor on 6/5/2015
Jeffrey J. Meffert, MD
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