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Blood sugar testing: Why, when and how

Type 1 diabetes

Your healthcare professional may suggest a CGM or blood sugar testing 4 to 10 times a day if you have type 1 diabetes. You may need to test:

  • Before meals and snacks, and sometimes after meals.
  • Before, after and sometimes during exercise.
  • Before bed.
  • Sometimes, during the night.
  • After treating low blood sugar.
  • More often if you're sick.
  • More often if you change your daily routine.
  • More often if you start a new medicine.