IgA nephropathy usually doesn't cause symptoms in the early stages, so the disease can go unnoticed for years or decades. It's sometimes suspected when routine tests reveal protein and red blood cells in your urine that can't be seen without a microscope (microscopic hematuria). IgA Signs and symptoms of IgA nephropathy include: IgA 
Cola- or tea-colored urine (caused by red blood cells in the urine)
Repeated episodes of cola- or tea-colored urine, and sometimes visible blood in your urine, usually during or after an upper respiratory or other infection and sometimes after strenuous exercise
Foamy urine from protein leaking into your urine (proteinuria)
Pain in the one or both sides of your back below your ribs
Swelling (edema) in your hands and feet
High blood pressure
