Sinus infection is an inflammation of one of the paranasal sinuses, which is usually caused by a viral infection. While IgA Nephropathy is an inflammation of mesangial areas of glomeruli,which is caused by immunoglobulin A deposition. Some people find that they get IgA Nephropathy after getting sinus infection, while some other people find they develop sinus infection after getting IgA Nephropathy. Is there any relationship between them? Now let’s have a look.