Papules are the basic damage of psoriasis vulgaris, starting as red papules or papules, the size of a beetle to a soybean or larger, and gradually increasing in size or fusing into patches of varying shapes and sizes, bright red or dark red in color. The symptoms are mainly scaly erythematous patches on the skin, which are susceptible to internal infection and external environmental triggers that can cause the disease to recur. The following clinical diagnostic methods are available at the time of the appearance of rubella. 1. The lesions can occur symmetrically in any part of the body. They are more likely to occur on the elbow, knee extensor and head. In a few patients, finger (toe) nails and mucous membranes may also be invaded. 2.Patients with erythrodermic rash are called erythrodermic psoriasis; the rash has a small amount of exudate, with wet scales. Or the initial small pustules, accompanied by fever and other symptoms is called pustular psoriasis; combined with arthritic lesions is called arthritic psoriasis. 3.Papular rash is prone to acute attacks and chronic occurrences, and tends to recur. The onset of disease is often related to the season, there are summer intensification, autumn and winter self-healing; there are also winter and spring relapse, into the summer to reduce the. The rash is the most difficult to treat, the treatment of the choice of products is also more important, Western medicine, hormonal products are not recommended, the best choice of Chinese ointment treatment.