The 11 features of lupus erythematosus are low to moderate fever, pteronyssinus erythematosus, erythema of the fingers and palms, painless ulcers, plasmacytosis multiforme, symmetric polyarticular swelling and pain, renal lesions, verrucous endocarditis, lupus encephalopathy, gastrointestinal symptoms, and antiphospholipid syndrome. 1. Fever of various heat types may be present, especially low, moderate fever is common. 2. Butterfly-shaped erythema and discoid erythema on the bridge of the nose and cheeks of both cheeks. 3. Erythema on the palms of the fingers and around the nails, ischemia of the fingertips, rash on the face and trunk. 4. Painless ulcers of the oral and nasal mucosa, alopecia areata is more common. 5. Multiple plasmacytomas may be present, such as bilateral pleural effusions and pericardial effusions. 6. Symmetrical polyarticular swelling and pain, mostly without articular bone destruction. 7. Renal lesions: lupus kidney may appear, mainly manifested as proteinuria, hematuria, tubular urine, edema and hypertension. 8. Involvement of the cardiovascular system may result in verrucous endocarditis. 9. Neuropsychiatric lupus, also known as lupus encephalopathy, can involve both the central nervous system and peripheral nervous system. 10. Digestive system with loss of appetite, abdominal pain, vomiting and diarrhea as the first symptoms. 11. Antiphospholipid syndrome: clinical manifestations include arterial or venous thrombosis, recurrent spontaneous abortion, thrombocytopenia. If the above manifestations occur, lupus erythematosus disease is considered, and timely consultation is recommended to avoid delaying the disease.