The symptoms of systemic lupus erythematosus mainly include fever, oral ulcers, facial erythema, including discoid and malar rash, photosensitivity, joint pain, polyserositis, including pleural effusion and pericardial effusion, as well as kidney involvement. The main manifestations are positive urinary protein, hematuria, and casts in the urine. Severe cases may have neurological involvement, presenting as epilepsy, mental disorders, or altered consciousness. Blood tests in these patients can further reveal positive ANA, anti-double-stranded DNA, and anti-Sm antibodies, as well as low complement levels. These are the related symptoms of systemic lupus erythematosus.