Some time (once or twice in month) i suddenly start feeling lack of energy with sensation of fever. Some times i start sweating very minor which i can also feel on my legs. My doctor did not give me specific reason but he told me that it is due to fall in blood sugar. this happens to me in evening between 4 to 7 pm. I am bit concerned that whether this condition will lead to diabetes or not, what is medical name for this condition. last week my glucose with fasting was 82 and high cholestrol