Continuous Glucose Monitoring & CGMs
For educational purposes only — not medical advice. Always consult a qualified healthcare provider. For adults 18+.
Continuous glucose monitors have changed how people see their blood sugar — no constant finger-pricks, just real-time trends on your phone. This guide explains how CGMs work and how to read them.
What a CGM is and how it differs from finger-prick meters, how the sensors work, understanding the trends and arrows, what 'time in range' means, and how to use the data with your care team.
What's inside
- →What a CGM is — continuous, no constant pricks
- →CGM vs finger-pricks — the difference
- →How the sensor works — the basics
- →Reading trends & arrows — what they mean
- →Time in range — a useful number
- →Using the data well — with your doctor
For educational purposes only
This guide is educational information about blood sugar and diabetes — it is not medical advice, diagnosis, or treatment, and it is not a substitute for care from a qualified professional. It does not diagnose, treat, cure, reverse, or prevent any condition. See your doctor or endocrinologist for diagnosis and a treatment plan, check your blood sugar as advised, and never change your insulin or diabetes medication, or your diet, without medical advice — changes can cause dangerously high or low blood sugar. Seek urgent care for signs of DKA (very high blood sugar, fruity breath, vomiting, confusion) or severe low blood sugar (shaking, sweating, confusion, passing out — treat with fast-acting sugar and get help). In a medical emergency, call 911.