Diabetes 210 two hours after dinner

by Waqar Tahir
(Lahore)

Original Question

My mother is about 45 years old and has not been diagnosed with diabetes. Because she had pain in her legs today, I checked her blood sugar. It was 210 mg/dL two hours after dinner. Is this a satisfactory reading?

Quick Answer:

A blood sugar of 210 mg/dL (11.7 mmol/L) two hours after dinner is high. One home reading after an ordinary meal cannot diagnose diabetes, but this result deserves prompt follow-up with proper laboratory testing, especially if similar readings occur again.

Answered by:
Dr. Albana Greca, MD, MMedSc

Family Physician, IDF Fellow

Is 210 mg/dL Two Hours After Dinner Normal?

No. A glucose reading of 210 mg/dL two hours after eating is elevated. The result may be influenced by the size and carbohydrate content of the meal, illness, stress, some medicines and the accuracy of the glucose meter.

The timing is also important. When interpreting blood sugar levels after eating, the two-hour interval is generally counted from the beginning of the meal.

Does a Reading of 210 Mean She Has Diabetes?

Not necessarily. A home glucose reading after an ordinary dinner is not, by itself, a diagnostic test for diabetes.

Diabetes can be diagnosed using laboratory tests such as a fasting plasma glucose of 126 mg/dL or higher, an HbA1c of 6.5% or higher, or a two-hour glucose of 200 mg/dL or higher during a formal 75-g oral glucose tolerance test. In the absence of clear symptoms or a hyperglycemic crisis, abnormal results usually need confirmation.

Our explanation of the different blood tests used to diagnose diabetes may help you understand which test her doctor may choose.

What Should She Do Next?

Arrange a medical appointment soon.

Ask for a fasting plasma glucose after at least 8 hours without calories.

Ask for an HbA1c test.

Repeat home glucose readings at consistent times if her doctor recommends monitoring.

Write down the readings and what she ate before them.

If she checks glucose again at home, following the correct steps in home blood glucose monitoring can reduce errors caused by technique or contaminated fingers.

Do not perform a homemade glucose tolerance test.

A diagnostic oral glucose tolerance test uses a standardized 75-g glucose drink and should be performed according to laboratory instructions. Mixing sugar into water at home is not an equivalent diagnostic test.

Could Pain or Stress Raise Her Glucose?

Pain, acute illness and physical or emotional stress can temporarily increase blood glucose because stress hormones make glucose more available in the bloodstream. Some medicines, particularly corticosteroids, can also raise glucose.

However, a reading of 210 mg/dL should not simply be blamed on pain. It is still worth checking whether her glucose is persistently elevated.

What About the Leg Pain?

One high glucose reading does not usually explain new leg pain by itself. Leg pain has many possible causes, including muscle strain, joint problems, nerve irritation and circulation problems. If the pain is severe, persistent, associated with swelling, redness, weakness or numbness, she should have it medically assessed.

When Is Urgent Help Needed?

A reading of 210 mg/dL without severe symptoms is usually not an emergency by itself. Seek urgent medical care if high glucose occurs with vomiting, confusion, difficulty breathing, severe dehydration, abdominal pain, inability to keep fluids down or unusual drowsiness.