Can glomerulonephritis cause whitening of the lower legs?
Generally, glomerulonephritis does not directly cause whitening of the lower legs. If you experience any discomfort, it is recommended to seek medical attention promptly. Detailed explanation is as follows:

Glomerulonephritis primarily involves inflammation of the glomeruli in the kidneys, which affects the kidney's filtration and reabsorption functions, leading to symptoms such as proteinuria, hematuria, edema, and hypertension. Although some patients may develop edema, this swelling typically manifests as swelling in areas such as the eyelids and lower limbs, rather than a whitening of the skin. However, because of the swelling in the lower legs, pressing on the affected area may cause it to turn white. There are several conditions that can cause whitening of the lower legs, such as severe anemia, Raynaud's disease, and lower limb arterial occlusive disease caused by atherosclerosis. If you notice any abnormal changes in the skin color of your lower legs, you should seek medical attention promptly for relevant examinations to determine the exact cause.
Patients with glomerulonephritis should follow a diet that is low in salt and fat and includes high-quality proteins, to avoid excessive salt intake which can worsen water and sodium retention.