Patients with chronic nephritis can drink lemonade, and patients with nephritis should have a low-salt, low-fat, high-quality and low-protein diet. Low-salt is to eat less pickled food and salty-flavored food; low-fat is to avoid cholesterol and fat-rich food; high-quality protein is to be high in biomass protein, mainly animal proteins, such as fish, meat, and egg whites, and to avoid plant protein-rich foods, such as soybean products and nut-like Foods, such as peanuts, melon seeds, pistachios, because the amount of essential amino acids contained in a small amount of metabolic waste, increasing the burden on the kidneys. Lemonade contains very low fat and protein content, which is in line with the dietary requirements of chronic nephritis. Chronic nephritis, if combined with chronic renal failure, especially the decline in the ability of the kidneys to discharge potassium, this time can lead to hyperkalemia, this time we should avoid eating potassium-rich foods, lemon is rich in potassium, so this time you can not drink more. Chronic nephritis should actively control blood pressure, reduce proteinuria, chronic nephritis is a chronic progressive disease, until the end stage of renal failure, that is, the uremia stage, the need for renal replacement therapy.