Nephrotic Syndrome is steroid sensitive.

Why does my condition relapse after every 1 or 2 years and tends to get cured immediately after intake of steroids. I am asking this because I have heard this a number of times that nephrotic syndrome tends to go away with time(unless it is major and steroid dependent) and generally is supposed to fade away with adolescence. My doctors have told me to avoid catching cold but how do I do that? If I have not caught a severe, intense cough and cold for straight 6 months it signifies nothing but my carefulness and precaution towards avoiding cold factors, still somehow inspite of all the efforts I catch this desease and its always the cold before I see positive signs of albumin in my R/E test. I raise this concern because of the prednisolone I take every time this condition occurs and it somewhat changes everything around me in small ways. My current creatinine levels are 0.9mg/dl and sodium, postassium levels are 137mEq/l, 4mEq/l. What advise can you professionals give me regarding this?