Nephrogenic edema means that the edema is caused by kidney disease and not by other causes, including hepatogenic edema, cardiogenic edema, and thyroidogenic edema, among others. Nephrogenic edema includes two aspects: first, nephropathic edema, and second, nephritic edema, both of which are collectively referred to as renal edema. Nephrogenic edema is caused by damage to the filtration membrane of the kidneys and a large loss of protein resulting in a decrease in albumin in the blood. The main function of albumin in blood is to maintain the balance of water inside and outside the blood vessels, and when it is lowered, it leads to the infiltration of water from inside to outside the blood vessels, which leads to the formation of edema. In contrast, nephrogenic edema is caused by a decrease in the drainage capacity of the kidneys, and a large amount of water is retained in the body, resulting in an increase in hydrostatic pressure inside the blood vessels, and water is pressed outside the blood vessels, causing edema, which are treated differently. Nephrotic edema needs to be treated with albumin supplementation and application of hormones, while nephritic edema needs to be treated with the application of diuretic drugs.