SLE diet should pay attention to avoiding photosensitive foods and try to choose foods rich in high quality protein, vitamins and so on. SLE can invade multiple organs and has various symptoms. Patients with the disease should try to avoid photosensitive foods, such as celery and mushrooms, when choosing food, which will increase photosensitivity and may increase the severity of the disease. Patients with SLE who develop mouth ulcers should also avoid pickled and smoked foods to promote tissue healing. Patients with renal insufficiency should also be careful to limit water intake and try to keep salt levels as low as possible, and eat a high-quality, low-protein diet. Try to choose foods rich in high-quality protein, such as eggs, beans, fish and milk, as well as foods rich in vitamins, such as fruits and green leafy vegetables. SLE patients can obtain professional dietary advice from rheumatology and immunology departments, nutrition departments and other relevant departments in regular hospitals.