First, if there are symptoms such as facial erythema, butterfly rash, joint pain, hair loss, or even stillbirth or miscarriage, systemic lupus erythematosus should be suspected. For systemic lupus erythematosus, related medical tests are necessary, including complete blood count, urinalysis, erythrocyte sedimentation rate, C-reactive protein, 13 autoantibody tests, and anticardiolipin antibodies. These are the primary and most basic tests, specifically the 13 autoantibody tests. If the diagnosis is confirmed based on these tests, further assessments such as heart evaluation, chest CT need to be perfected. When necessary, 24-hour urine protein quantitation and kidney biopsy should be performed to assess the damage to the kidneys and the severity of the condition, mainly influencing the subsequent treatment plan.