(HealthDay News) -- People with diabetes should monitor the amount of glucose (sugar) in their blood. Insulin and certain drugs often are key, but so is understanding what causes blood sugar levels to fluctuate.

The American Diabetes Association mentions these factors:

  • The foods you eat.
  • How much you exercise, and when.
  • Where in the body you inject insulin.
  • The time of day that you inject yourself.
  • Being sick.
  • Being under stress.