A Practical Guide for Persons with Diabetes on Reading BG Test Results
Understanding your blood glucose (BG) test results is a crucial part of managing diabetes. It's not just about seeing a number; it's about interpreting that number in the context of your daily life, understanding what it means for your health, and making informed decisions based on it. This guide will walk you through the process of reading and interpreting your BG test results so you can effectively manage your diabetes and live a healthier life.
Why Monitoring Blood Glucose is Important
Blood glucose monitoring provides a snapshot of your blood sugar levels at a specific moment in time. These results help you and your healthcare team understand how your body is responding to different factors, such as food, exercise, medication, and stress. Regularly tracking your BG levels can help you:
- Identify patterns: Recognize how different meals or activities impact your blood sugar.
- Adjust medication: Work with your doctor to adjust insulin dosages or other medications for optimal control.
- Prevent complications: Keep your blood sugar within the target range to minimize the risk of long-term complications like nerve damage, kidney disease, and vision problems.
- Make informed decisions: Know when to eat, exercise, or take medication based on your current blood sugar level.
Without routine monitoring, managing diabetes becomes like navigating without a map – it’s possible, but significantly more challenging and less predictable. Consistent monitoring is the cornerstone of proactive diabetes management.
Understanding Blood Glucose Target Ranges

Blood glucose targets can vary based on individual factors like age, type of diabetes, overall health, and other medications you are taking. Work with your healthcare provider to determine the most appropriate blood glucose target range for you. However, general guidelines are:
- Fasting Blood Sugar (Before Meals): 80-130 mg/dL (4.4-7.2 mmol/L)
- 2-Hour Postprandial (After Meals): Less than 180 mg/dL (10.0 mmol/L)
- A1C: Less than 7% (Work with your doctor to determine YOUR A1c target. Some people with diabetes may need more lenient targets, whereas younger people, and pregnant women require tighter control)
It's important to remember that these are just general guidelines. What is considered "in range" for one person might not be for another. Discuss your personal target range with your healthcare provider and use these targets as your guide for daily management.
Blood Glucose Levels: At a Glance
The following table summarizes the different blood glucose ranges and what they generally indicate: Understanding Your Blood Sugar Level A1C Vs Daily Glucose Readings
| Blood Glucose Level | Range (mg/dL) | Interpretation | Action | | ------------------------ | ------------- | --------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Hypoglycemia (Low) | Below 70 | Your blood sugar is too low. This can be dangerous if left untreated. | Treat immediately with fast-acting carbohydrates like glucose tablets, juice, or hard candies. Retest in 15 minutes and repeat if necessary. Contact your doctor if you have frequent or severe episodes. | | Normal (Fasting) | 70-100 | Your blood sugar is within the normal range when fasting. | Continue your healthy lifestyle habits. | | Normal (Postprandial)| Less than 140 | Your blood sugar is within the normal range after meals. | Continue your healthy lifestyle habits. | | Prediabetes (Fasting)| 100-125 | Your blood sugar is higher than normal but not yet in the diabetes range. | Work with your doctor to develop a plan to prevent or delay the onset of diabetes through lifestyle changes. | | Prediabetes (Postprandial)| 140-199 | Your blood sugar is higher than normal but not yet in the diabetes range after meals. | Work with your doctor to develop a plan to prevent or delay the onset of diabetes through lifestyle changes. | | Hyperglycemia (High) | Above 130 (Fasting) / Above 180 (Postprandial) | Your blood sugar is too high. Consistent high levels can lead to long-term complications. | Take action to lower your blood sugar through diet, exercise, or medication adjustments, as directed by your doctor. Monitor frequently and contact your doctor if levels remain high. | What Is A Dangerous Blood Sugar Level Recognizing A Crisis
Factors Affecting Blood Glucose Levels
Many factors can influence your blood sugar levels, both positively and negatively. Understanding these factors can help you predict and manage your blood sugar more effectively:
- Food: Carbohydrates are the primary source of glucose in the body. The amount and type of carbohydrates you consume will directly impact your blood sugar.
- Exercise: Physical activity can lower blood sugar by increasing insulin sensitivity and helping your muscles use glucose for energy.
- Medication: Insulin and oral diabetes medications are designed to lower blood sugar levels.
- Stress: Stress hormones can raise blood sugar levels.
- Illness: Infections and illnesses can cause blood sugar to fluctuate.
- Hormones: Hormonal changes, such as those related to menstruation or menopause, can affect blood sugar.
- Time of Day: Blood sugar levels may naturally be higher in the morning due to hormonal changes (dawn phenomenon).
- Dehydration: Dehydration can affect blood glucose levels.
By identifying which factors have the greatest impact on your blood sugar, you can be more proactive in managing your diabetes.
Practical Tips for Responding to Your BG Results
Once you have a blood glucose reading, you need to know how to interpret it and take appropriate action. Here are some practical tips:
1. Low Blood Sugar (Hypoglycemia)
- Symptoms: Shakiness, sweating, dizziness, hunger, confusion, irritability.
- Action:
- Check: Confirm the reading with another test.
- Treat: Consume 15-20 grams of fast-acting carbohydrates (e.g., 4 glucose tablets, ½ cup of juice, or 1 tablespoon of honey).
- Wait: Recheck your blood sugar after 15 minutes.
- Repeat: If your blood sugar is still below 70 mg/dL, repeat steps 2 and 3.
- Eat: Once your blood sugar is above 70 mg/dL, eat a snack or meal to prevent another drop.
- Example: You test your blood sugar and get a reading of 65 mg/dL. You feel shaky and sweaty. You eat 4 glucose tablets. After 15 minutes, you retest, and your blood sugar is now 85 mg/dL. You eat a handful of almonds and a piece of fruit.
2. High Blood Sugar (Hyperglycemia)
- Symptoms: Increased thirst, frequent urination, blurred vision, fatigue, headache. (Sometimes there are no symptoms).
- Action:
- Check: Confirm the reading with another test.
- Hydrate: Drink plenty of water to help flush out excess glucose.
- Exercise: If appropriate, engage in light physical activity to help lower blood sugar.
- Medicate: If you take insulin or oral medications, follow your doctor’s instructions for adjusting your dosage.
- Monitor: Retest your blood sugar in 1-2 hours to see if your actions have lowered your levels.
- Example: You test your blood sugar after dinner and get a reading of 220 mg/dL. You feel thirsty and have been urinating frequently. You drink a large glass of water and go for a 20-minute walk. You follow your doctor’s instructions and take an extra unit of insulin.
3. In-Range Blood Sugar
- Action: Celebrate! Continue with your regular diabetes management routine:
- Follow your meal plan.
- Engage in regular physical activity.
- Take your medications as prescribed.
- Monitor your blood sugar as directed by your doctor.
Tools and Resources for Blood Glucose Monitoring
Several tools and resources can help you effectively monitor and manage your blood glucose:
- Blood Glucose Meter: Choose a meter that is accurate, easy to use, and fits your needs.
- Continuous Glucose Monitor (CGM): A CGM provides continuous blood glucose readings throughout the day and night, allowing you to see trends and patterns in your blood sugar levels.
- Diabetes Management Apps: Many apps are available to help you track your blood glucose, food intake, exercise, and medication.
- Diabetes Education Programs: Consider attending a diabetes education program to learn more about diabetes management and self-care.
- Support Groups: Connecting with other people with diabetes can provide emotional support and practical advice.
Common Mistakes to Avoid
Even with the best intentions, it's easy to make mistakes when monitoring blood glucose. Here are some common pitfalls to avoid:
- Using Expired Test Strips: Expired test strips can give inaccurate readings.
- Not Washing Hands: Food or other substances on your hands can contaminate the test strip.
- Improperly Storing Supplies: Heat, humidity, and direct sunlight can damage test strips and meters.
- Ignoring Patterns: Don’t just look at individual readings; pay attention to trends over time.
- Making Changes Without Consulting Your Doctor: Always consult your healthcare team before making significant changes to your medication or treatment plan.
When to Seek Professional Help
While self-management is crucial, it's important to know when to seek professional help. Contact your doctor or diabetes educator if you experience:
- Frequent episodes of hypoglycemia or hyperglycemia.
- Significant changes in your blood glucose patterns.
- Symptoms of diabetes complications.
- Difficulty managing your blood glucose despite your best efforts.
- Confusion about your treatment plan.
Reading and interpreting your blood glucose test results is a fundamental skill for anyone living with diabetes. By understanding your target ranges, identifying factors that affect your blood sugar, and taking appropriate action, you can effectively manage your diabetes and live a healthier, more fulfilling life. Remember to work closely with your healthcare team to develop a personalized diabetes management plan that meets your individual needs. Type 1 Vs Type 2 Diabetes A Complete Guide To Understanding Your Diagnosis