Increase in Urine Protein Levels While Suffering from Viral or Bacterial Infection Such as Common Cold

Why does my protein level increase when I have a cold or other viral or bacterial infection, and what is the proper course of treatment.  I am suffering from minimal change disease and am currently taking a very low dose of cyclosporine and no prednisone.  This happens every time I get a cold, and the doctors' thinking is varied about treatment.  I want to understand why this happens because I was just about ready to be finished with all medications until symptoms reappear.  I get very depressed and anxious over this never-ending struggle and work in a high profile job where I am constantly around a lot of people.  I cannot lock myself in the house.