1, psoriasis are winter heavy summer light, psoriasis is easy to acute attack, chronic through, tend to relapse. The onset of the disease is often related to the season, there is a summer increase in drama, fall and winter self-cure; there are also winter and spring recurrence, into the summer to reduce. 2.What are the diagnostic contents of psoriasis? Psoriasis is a pinhead to lentil-sized inflammatory flat papule at the onset, gradually increasing to a coin or larger light red infiltrated spot, with a clear boundary, covered with multiple layers of silver-white scales. Gently scrape off the surface scales, then break out a layer of light red shiny translucent film, called film phenomenon. If you scrape off the film again, there will be small bleeding spots, called punctate hemorrhage phenomenon. 3, there are many types of psoriasis, psoriasis patients with secondary erythroderma called erythroderma type psoriasis, the rash has a small amount of ooze, with wet scales. Or small pustules at the beginning, accompanied by fever and other symptoms is called pustular psoriasis; combined with joint lesions is called arthritic psoriasis. 4, the development process of this disease, psoriasis diagnosis what are the contents of the skin lesion form can be manifested in various forms. The acute stage of the skin lesions are mostly dot-drop, bright red, itching is more significant. In the quiescent stage, the skin lesions are often plaque-like or map-like. In the waning phase, the lesions are often annular or semi-annular in shape. The scales on a few rashes are thicker and sometimes accumulate like oyster shells. The lesions may occur symmetrically on any part of the body. Preferably on the elbow, knee joint extension and head. In a few patients, the fingernails and mucous membranes may also be invaded.