Blood Glucose Testing — How and When to Check

Checking blood glucose is the simplest, most direct way to know what’s happening right now. Even with a CGM, finger‑prick testing still matters.

When to check

• Before meals and before bed
• Before driving
• During and after exercise
• When sick or adjusting insulin
• If symptoms don’t match CGM readings

Why it matters

• Early detection of highs/lows prevents accidents and hospital visits.
• Frequent checks improve pattern recognition.
• Supports safer insulin adjustments.