There is no absolute dietary contraindication for lupus erythematosus nephritis, but you should eat less salt, control water in moderation, and avoid eating too much protein-rich food. Systemic lupus erythematosus is an autoimmune disease, which is caused by an immune disorder in the body that produces many antibodies that attack the kidneys, resulting in lupus nephritis. Many patients with lupus nephritis have edema and high blood pressure, so they should not eat too much salty food, otherwise it will easily lead to the aggravation of edema and further increase in blood pressure; water should also be limited in moderation, because drinking too much water and eating too much salt are the same effect. In addition to edema and high blood pressure, many patients with lupus nephritis have urine protein, which is like a barbed iron ball that damages the kidneys during the process of losing it. If you eat too much protein, the loss from the kidneys will also increase and thus the damage to the kidneys will increase. Therefore, it is important to limit the amount of protein-rich foods, such as soy products, eggs, quail eggs, lean meat, fish, milk, etc.