Morning fatigue in a person with diabetes can have many causes, even if you take medicines regularly. It may be due to low or high blood sugar at night or early morning, low blood pressure from Telmikind-H, poor sleep, anaemia, or vitamin deficiencies. Try checking your fasting and early-morning sugar levels and BP, eat a light bedtime snack if advised, and discuss these symptoms with your doctor so your medicines or doses can be reviewed.