A 42-year old housewife presented herself with flu symptoms and dry cough. Because of pregnancy test (chest x-ray) we accidentally detected a hematuria. Exact medical history revealed the presence of a known IgA-Nephropathy. Banal respiratory infections can exacerbate IgA Nephropathy. In addition, medical history and further investigations are important because of possible secondary IgA-Glomerulonephritis. Treatment of IgA glomerulopathy depends on blood pressure, renal function and degree of proteinuria. An acute renal insufficancy is uncommon (< 5%), but 25% patients develop during 20-25 years a terminal insufficandy.