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Complete Guide

Blood Sugar Monitoring

Your Complete Guide to Glucose Testing

Why Monitor Blood Sugar?

Blood sugar monitoring provides immediate feedback on how food, activity, stress, and medications affect your glucose levels. Regular monitoring helps you and your healthcare team make informed decisions about treatment adjustments and prevents both high and low blood sugar complications.

Monitoring patterns over time is more valuable than isolated readings. WellAlly helps you track and identify trends.

Target Blood Sugar Ranges

Fasting/Before meals: 80-130 mg/dL
2 hours after meals: Below 180 mg/dL
Bedtime: 90-150 mg/dL
Hypoglycemia: Below 70 mg/dL
A1C target: Below 7% for most adults
Targets are individualized by your doctor

Monitoring Methods

Fingerstick Testing

Traditional method using test strips and meter

✓ Most affordable, gives exact number, requires multiple daily tests

Continuous Glucose Monitor (CGM)

Sensor measures glucose every few minutes

✓ Shows trends and patterns, alarms for highs/lows, more expensive

Flash Glucose Monitoring

Sensor scanned with reader for results

✓ No fingersticks, less expensive than CGM, doesn't have alarms

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Common Symptoms

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Warning Signs (Seek Care)

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When to Test Blood Sugar

1

First Thing in the Morning

Fasting blood sugar shows how well your body controls glucose overnight and without food influence.

2

Before Meals

Pre-meal readings help determine medication doses and food choices for the upcoming meal.

3

2 Hours After Meals

Post-prandial readings show how your body handles the carbohydrates you just ate.

4

Before and After Exercise

Activity affects glucose differently depending on type and intensity. Patterns help you exercise safely.

5

When You Feel Symptoms

If you suspect low blood sugar, test immediately. Treat if below 70 mg/dL.

6

When Sick or Stressed

Illness and stress often raise blood sugar. Test more frequently during these times.

7

Before Bedtime

Ensures you're not going to sleep with low blood sugar. Important if you take insulin.

8

When Changing Medications

More frequent testing helps assess how new treatments affect your glucose control.

Blood Sugar Monitoring Facts

📊

6+

Times daily recommended for insulin-dependent diabetics

📊

30%

Improvement in A1C with regular monitoring

📊

50%

Of hypoglycemic episodes occur at night

Frequently Asked Questions

How often should I test my blood sugar?
Depends on your diabetes type and treatment. Insulin users typically test 4+ times daily. Others may test less. Follow your doctor's recommendations.
Is CGM better than fingerstick testing?
CGM provides more data and trends but costs more. Many use both. Insurance coverage varies. Discuss options with your healthcare team.
Do I have to test my fingers?
Most meters allow alternate site testing (palm, forearm) but fingers show changes most rapidly. Alternate sites are fine for routine testing.
What if I can't afford test strips?
Discuss cost concerns with your doctor and pharmacist. Many programs offer assistance. Some meters have less expensive strips.
What is time in range?
The percentage of time your blood sugar is in target range (70-180 mg/dL for most). Newer metric complementing A1C for assessing control.
Should I test when I feel fine?
Yes, regular testing even when asymptomatic identifies patterns and prevents surprises. Hypoglycemia can occur without symptoms.
How accurate are home glucose meters?
Modern meters are quite accurate (within 15% of lab values). Use proper technique for best results. Bring your meter to appointments for comparison.
What is a dawn phenomenon?
Early morning blood sugar rise due to hormones. Not the same as Somogyi effect (rebound from nighttime low). CGM helps distinguish.
Do I need to keep a log?
Yes! Logging reveals patterns. Many meters store data. WellAlly consolidates all your readings in one place with easy sharing.
Can exercise cause low blood sugar?
Yes, especially if you take insulin or certain medications. Test before, during (if exercising long), and after exercise. Always carry glucose.

Track Your Blood Sugar with WellAlly

Log readings, identify patterns, share with your doctor

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Blood Sugar Monitoring: When and How to Test