Symptoms and Signs of Postinfectious Glomerulonephritis Symptoms and signs range from asymptomatic hematuria (in about 50%) and mild proteinuria to full-blown nephritis with microscopic or gross hematuria (cola-colored, brown, smoky, or frankly bloody urine), proteinuria (sometimes nephrotic-range), oliguria, edema, hypertension, and renal insufficiency.