Checking Your Blood Glucose
Monitoring your blood glucose (blood sugar) helps you understand how your body responds to food, physical activity, medications, illness, and stress. Checking your levels regularly can help you and your healthcare team make decisions that support better diabetes management.
This guide explains:
- Why checking blood glucose is important
- When you may need to check it
- How to test your blood sugar
- Tips for accurate results
Why Checking Blood Glucose Matters
When you check your blood sugar, you get immediate information about your current glucose level. This information can help you:
✔ Understand how meals affect your blood sugar
✔ See how physical activity impacts your body
✔ Know whether medications are working properly
✔ Identify high or low blood sugar levels early
Regular monitoring allows you to adjust your daily habits and treatment plan to better manage diabetes.
Ways to Check Your Blood Glucose
There are two main methods for checking blood sugar at home:
1. Blood Glucose Meter (Finger Stick Test)
This common method uses:
- A small handheld meter
- Test strips
- A lancet (small needle)
A small drop of blood from your fingertip is placed on a test strip, and the meter displays your blood sugar level within seconds.
2. Continuous Glucose Monitor (CGM)
Some people use a wearable sensor that measures glucose levels throughout the day and night. These systems can provide trends and alerts when blood sugar is too high or too low.
Your healthcare provider can help determine which option is best for you.
How to Check Your Blood Sugar with a Meter
Follow these steps to test your blood glucose:
- Wash your hands with soap and warm water and dry them well.
- Insert a test strip into the glucose meter.
- Use a lancet to prick the side of your fingertip.
- Gently squeeze to get a small drop of blood.
- Touch the drop of blood to the test strip.
- Wait for the meter to display your blood sugar reading.
Keeping your hands clean helps ensure accurate results.
When Should You Check Your Blood Sugar?
Your healthcare provider will recommend the best schedule for you. Common times include:
✔ First thing in the morning (before eating)
✔ Before meals
✔ About 1–2 hours after meals
✔ Before and after physical activity
✔ Before bedtime
✔ Whenever you feel symptoms of high or low blood sugar
How often you check may depend on your type of diabetes, medications, and overall treatment plan.
Keeping a Blood Sugar Record
Tracking your readings helps you and your healthcare team identify patterns.
You may record:
- Date and time of test
- Blood sugar result
- Meals or snacks eaten
- Physical activity
- Medication taken
- Any symptoms you experienced
Many glucose meters or smartphone apps allow you to store and track readings automatically.
Tips for Accurate Blood Sugar Checks
✔ Wash and dry your hands before testing
✔ Use fresh test strips and check expiration dates
✔ Use the side of your fingertip instead of the center
✔ Rotate fingers to avoid soreness
✔ Follow instructions for your specific glucose meter
Proper technique helps ensure reliable readings.
Signs Your Blood Sugar May Be Too High or Too Low
High Blood Sugar (Hyperglycemia)
Possible symptoms you may notice:
- Increased thirst
- Frequent urination
- Fatigue
- Blurry vision
- Headaches
Low Blood Sugar (Hypoglycemia)
Possible symptoms include:
- Shaking
- Sweating
- Dizziness
- Confusion
- Fast heartbeat
- Irritability
If you experience symptoms, check your blood sugar and follow your provider’s treatment plan.
This is not a comprehensive list of hyper-/hypoglycemia symptoms. Ask your healthcare provider for a complete list of symptoms to watch for.
Always ask your healthcare provider for specific advice on when to call to report symptoms, and when to seek urgent/emergency care.
When to Talk to Your Healthcare Provider
Contact your provider if:
- Your readings are consistently above or below your target range
- You experience frequent symptoms of high or low blood sugar
- Your monitoring equipment is not working properly
- You are unsure how to interpret your results
Your care team can help adjust your treatment plan if needed.
Daily Blood Sugar Monitoring Checklist
☐ Check blood sugar as recommended
☐ Record your results
☐ Take medications as prescribed by your healthcare provider
☐ Eat balanced meals
☐ Stay physically active (as approved by your healthcare provider)
☐ Drink enough water (as directed by your healthcare provider)
☐ Contact your provider if readings are concerning
Consistent monitoring can help you stay informed and take charge of your diabetes care.
Medical Disclaimer
This resource is for educational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Individuals should consult their physician, endocrinologist, certified diabetes educator, or qualified healthcare provider for personalized guidance regarding blood glucose monitoring and diabetes management. Always follow individualized healthcare recommendations and seek medical attention if you experience severe symptoms or unusual blood sugar readings. Call 911 if you are experiencing a medical emergency.
Sources:
This handout is for educational purposes only and is not a substitute for professional medical advice. Always follow your healthcare provider’s instructions.
This content was created with the assistance of AI. Any AI-generated content was reviewed by a Nurse Practitioner.