What is IgA Nephropathy: IgA nephropathy, also known as Berger's disease, is a kidney disorder characterized by the accumulation of Immunoglobulin A (IgA) antibodies in the kidneys. IgA is a type of antibody that helps the body fight infections, but in IgA nephropathy, these antibodies build up in the small blood vessels (glomeruli) of the kidneys. This can lead to inflammation and damage to the kidney tissues over time. " IgA Nephropathy Treatment in Ayurveda ".