As others have said it may be an infection or virus that's causing the highs. The one annoying thing is that sometimes when sugars go high we never find out the actual reason behind it. Have you discussed your background (basal) insulin with your DSN? That does need to change from time to time (and for others more often than that). So it could be that you've hit a phase in your life where you just need more insulin? I'm 48 and I need more insulin before periods, during stressed times, when I'll and, as I've said, at 'other' odd times when it's just my body needs more insulin. All the best.