Lupus erythematosus is most common in women of childbearing age, people with a family history of lupus erythematosus, and those who are frequently exposed to ultraviolet rays. The etiology of lupus erythematosus is complex, and the disease mechanism is not yet completely clear. According to the histopathological characteristics and clinical manifestations, it can be divided into systemic lupus erythematosus and cutaneous lupus erythematosus, of which the incidence of cutaneous lupus erythematosus is 1:3 between men and women, and is mostly seen in middle-aged people in the age range of 40~50 years old, while the incidence of systemic lupus erythematosus has a large geographical difference, with a ratio of 1:9 between men and women. SLE is most common in women of childbearing age, and pregnancy can exacerbate or trigger the disease. Some studies have shown that sex hormones may be related to the development of SLE. There is also a familial tendency for the disease to run in families, with a heritability of about 43%, and lupus can be exacerbated or triggered by frequent exposure to ultraviolet light. Patients with lupus erythematosus are advised to go to the rheumatology and immunology departments of regular hospitals for detailed consultation and standardized treatment as prescribed by doctors.