The performance of lupus erythematosus is more typical, mainly including the following points: 1. Discoid erythema: it is manifested as a red circular, ring-shaped or irregular rash on the face, neck, ears, arms, forehead and V-zone in front of the neck; the erythema is the size of green beans to soybeans, with scales adhering to the surface, leaving pigmentation and scarring after healing; the center of the erythema is atrophied, and the edge of the erythema is slightly elevated and higher than the center, similar to a disk The rash is mainly characterized by hyperkeratosis and basal cell edema, accompanied by vacuole formation and hair follicle embolism; 2. butterfly-shaped erythema: it is a rash unique to SLE and is of great significance for disease diagnosis; the lesions are on the bridge of the nose and both cheekbones, connected by the bridge of the nose, and are light red or bright red in color, similar to the butterfly-shaped regional erythema, mostly without obvious 3. photosensitivity: red macules, papules or maculopapular rashes appear on exposed skin after ultraviolet irradiation, and sometimes erythema multiforme, fixed urticaria and discoid erythema may appear; 4. facial cornual lupus: prevalent on the face of adults, especially near the eyelids, nose, and around the mouth and cheeks; manifests as light red or reddish-brown round papules or nodules of 2-3 cm in diameter, with nodules The surface is relatively smooth, and some of the nodules may have pinhead-sized pustules or scaly crusts at their tips.