Does anyone know if there are any illnesses that can cause your blood sugar levels to decrease all together? I am asking because I have been diabetic for over 10 years and on insulin. In the last 4 months I have lost 53lbs, woozy all the time, my A1c has gone from 12 to 6 and I have had to take my Levimir from 30 units in morning to 20 units in morning and my novolog from 20 units before meals to 6 units before meals in the last 3 weeks. Does anyone know what might cause this to happen? I haven't made any changes in my eating habits either.