Subacute cutaneous lupus erythematosus is a subtype of lupus erythematosus. In addition, it also includes systemic lupus erythematosus, drug-induced lupus erythematosus, discoid lupus, etc. Subacute lupus erythematosus is also called superficial disseminated lupus, subacute disseminated lupus, psoriatic lupus, disseminated lupus, etc. Scattered discoid lupus, etc., patients are clinically divided into two types: papulosquamous type and annular erythema type. Laboratory tests can show a decrease in the total number of white blood cells in peripheral blood, and urine routine is mostly normal, but the erythrocyte sedimentation rate can increase rapidly, and sometimes rheumatoid factor can be positive.

The disease itself is more common in women, and the ratio of men to women is about 1:3. Some people believe that subacute cutaneous lupus erythematosus may be an early manifestation of systemic lupus erythematosus, and some patients may develop it in the future. develops into systemic lupus erythematosus, so when very mild lupus erythematosus occurs, or only a rash appears, regular reexaminations must be carried out, including blood routine, liver function, kidney function, complement and other tests, including kidney B-ultrasound, hepatobiliary B-ultrasound, etc. are used to track the patient and prevent further development of the patient's condition.