Purpura nephritis patients are allowed to eat leeks. Purpura nephritis is a common clinical secondary glomerular disease that can manifest as skin purpura, joint pain, abdominal pain, and kidney damage. Kidney damage can be manifested as hematuria, proteinuria, edema, hypertension, and abnormal renal function in some patients. If patients do not have obvious kidney function abnormalities, they can eat leek at this time, because leek is rich in vitamin C, vitamin B1, vitamin B12, carotene, fiber and other substances, with kidney tonic, stomach, refreshing, laxative and other effects, for purpura nephritis patients have certain benefits. However, when patients have renal insufficiency, the excretion of potassium by the kidneys is reduced, leeks contain more potassium, if eaten in large quantities leeks can lead to hyperkalemia, and should be reduced.