There are multiple factors, why your blood sugars might rise. The most common ones are:

  • Food
  • Drinks
  • Some artificial sweeteners
  • Exercise
  • Waking up (called the 'dawn phenomenon')
  • Stress
  • Low sleep quality
  • Sunburn
  • Dehydration
  • Caffeine
  • Illnesses, such as the flu
  • Medicines (they can have added components, such as maltodextrin)
  • Birth control pills