IgA nephropathy is a pathological type of chronic glomerulonephritis, and patients are prone to edema. The treatment of this edema is divided into two aspects: First, it is necessary to control the condition of IgA nephropathy itself. If there is a significant amount of proteinuria or a large formation of crescents in the glomeruli, the patient may need to use steroids and immunosuppressive agents to control the inflammatory response in the glomeruli. This is the fundamental approach to treating this disease. Second, symptomatic treatment is applied. For mild edema, no special treatment is generally required. However, for severe edema or even systemic edema, it may be appropriate to use diuretics to increase urine output, which can alleviate the patient's edema. However, this is not a solution to the root cause of the problem.