Inflammation of the skin lesions of psoriasis were more obvious that often appears bright red, covered with loose, easily fall off of the silver-white scales, often around the periphery flush skin lesions, during periods such as the stimulation of healthy skin, psoriasis skin lesions can occur, known as the "same form response: This is one of the characteristic features of psoriasis, with the form of response may be secondary to trauma, simple stimulation, injection, surgical incision, etc. , can also be secondary to eczematous dermatitis, or old scars, etc. , does not appear in the same form of response has generally quiescent and regression period.

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