Archive · 1 Aug 2025
Expert Advice on High Blood Sugar & Low Blood Sugar After Meals
Someone asked a doctor about high blood sugar numbers even though they weren't on medicine.
The doctor said their numbers show the start of diabetes.
After eating, their blood sugar goes up too high, and the body releases too much insulin, causing blood sugar to drop too low later, making them feel shaky and dizzy.
To help, the doctor suggests eating meals with protein and fiber, eating small meals often, avoiding sugary foods, checking blood sugar regularly, and seeing a diabetes doctor.
A person reported high HbA1c, fasting, and post-meal blood sugar levels, despite not taking medication.
Expert Dr. Negalur explained the concerning blood sugar readings and the implications of the values.
The pattern suggests reactive hypoglycemia, with blood sugar spikes followed by drops 3-4 hours after meals.
Symptoms include shakiness, dizziness, and sweating, indicative of low blood sugar.
Recommendations include balanced meals, smaller meals, reduced refined carbs, monitoring, and consulting a diabetologist.
- Who
- A person experiencing high blood sugar levels after meals, followed by hypoglycemia.
- What
- An individual experiences high blood sugar levels and subsequent hypoglycemia symptoms.
- When
- The individual experiences blood sugar drops approximately 3-4 hours after eating.
- Where
- Information presented in the article is applicable generally to an individual experiencing the described condition.
- Why
- The person's body releases too much insulin in response to a high-carb meal, leading to blood sugar crashes.
Patient Concerns
Expert Perspective
Blood Sugar Fluctuations
Patient Concerns
Experiencing high blood sugar levels, not taking any medication, and then experiencing low blood sugar levels a few hours after meals.
Expert Perspective
Expert Dr. Negalur identifies reactive hypoglycemia as the issue due to overshooting insulin response after a meal causing blood sugar spikes and subsequent crashes.
- HbA1c
- 7%
- Ideal HbA1c
- Below 5.7%
- Fasting Glucose
- 130 mg/dL
- Ideal Fasting Glucose
- Below 100 mg/dL
- Post-Meal Glucose
- 200 mg/dL
- Ideal Post-Meal Glucose
- Below 140 mg/dL