For a patient with diabetes, why is monitoring blood glucose crucial during illness?

• A. Illness prevents hyperglycemia.
• B. Glucose monitoring is unnecessary during illness.
• C. Only occurs with exercise.
• D. Illness can cause hyperglycemia due to stress hormones and infection; monitor and adjust as directed.

Answer: (D)

During illness, the body mounts a stress response that releases hormones such as cortisol and adrenaline. These hormones increase glucose production by the liver and make the body's tissues less sensitive to insulin, so blood glucose tends to rise. At the same time, illness often means reduced food and fluid intake, which can complicate insulin dosing and lead to swings in sugar levels. Because glucose can climb quickly in this situation, frequent monitoring allows you to catch rising numbers early and adjust insulin or other medications as directed by a healthcare provider, helping prevent dehydration, ketosis, or more serious diabetic emergencies. Staying hydrated and following sick-day guidelines for diabetes management support stable blood sugar during illness.