My mother is a type 1 diabetic and is extremely fragile (a sinus infection threw her into DKA a couple weeks ago) she usually runs high but recently she's been having periods of running low both without external insulin and dispite what she's eating. The last few nights she goes to bed with little or no insulin and running about 200 and she'll wake up 40-60. Last night she ran 450 and took only half as much as she normally would and woke up at 55. What could cause this?