Diabetes Monitor - Information, education, and support for people with diabetes

Diabetes Monitor - Times To Check Your Blood Sugar

Publication Date: 1/6/2010

Sometimes people wonder when it would be "best" to check the blood sugar level.

There isn't any single best time, but here are some suggestions.

  • Before meals.
  • At bedtime.
  • If you think you are having low sugar symptoms.
  • If anyone thinks you are having low sugar symptoms.
  • About one-and-a-half hours after eating.
  • At about 3:00 AM.
  • If you are ill. (Be sure to check several times daily; if the results are higher than usual, call for advice!)
  • Before driving an automobile or operating other dangerous machinery.
  • Both immediately before, and after, active exercise. (Also, if you have the chance, check an hour before the exercise).
  • For at least 3 days after any doctor changes any of your medications.
  • At least 4 times a day during hospitalizations.
  • If you are curious.

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