Low Blood Sugar without Diabetes (Symptoms and Causes)

Low blood sugar or hypoglycemia is often associated with glucose metabolism problems such as diabetes, especially type-1 diabetes (when the production of insulin by pancreas drops significantly – even there may be no any insulin produced by pancreas.). But does it also occur in people without diabetes? What are the symptoms and causes of hypoglycemia in non diabetics?

Since the insulin production drops significantly, most patients with type-1 needs to take insulin replacement through injection or medicines to restore the balance of their insulin in the circulation for blood  sugar (glucose) control.  The problem is when the treatment is taken improperly or too much, leading to a significant decline in blood sugar (much lower than normal)!

Interestingly, hypoglycemia is not only for diabetics. Although in general it is commonly found in diabetes, it also can occur in non-diabetics (in rare cases).

Can low blood sugar occur after eating?

In many cases, low blood glucose occurs  when we don’t eat for many hours (such as after fasting).

But sometime it also can occur even after meal. For such case, the over production of insulin after meal is often to blame.

If there are too many insulin in the circulation,  glucose in the blood can drop (lower than normal) even after eating. Postprandial hypoglycemia is term used to call low blood sugar that occurs after meal. It is more likely to occur in people who have a personal history of gastric bypass surgery.

Insulin is a crucial hormone to regulate the amount of glucose in your bloodstream. Normally, the release of this hormone is equivalent with the amount of glucose in the circulation. It plays a key role in your glucose metabolism. It helps cells of the body to absorb glucose from the bloodstream for energy. Without adequate insulin, your blood sugar can spike easily.

In some people, (due to certain reason) the release of their insulin into the bloodstream can be higher or lower than normal. Both of these imbalances are bad. While too much insulin in the bloodstream can lead to hypoglycemia, too low insulin can lead to hyperglycemia (when the amount of glucose in the blood is higher than normal).

See also the differences between hyperglycemia and hypoglycemia, before continuing!

Low blood sugar symptoms without diabetes

low_blood_sugar_without_diabetes_illustrationThe symptoms of hypoglycemia in non-diabetics vary, depending on how far glucose in the blood drops. But the main ones include:

  1. Lack of glucose in the circulation may lead to paleness.
  2. Shakiness and trembling.
  3. Lack of energy.
  4. Fatigue (weakness or /and tiredness)
  5. Poor coordination.
  6. Increased hunger, which may be followed with nausea or even vomiting.
  7. Irritability, anxiety, agitation, or altered mental status may also occur.
  8. Excessive sweating /perspiration. If hypoglycemia occurs when you sleep at night, your pajamas can be damp and you may wake up with dizziness.
  9. Problem in concentrating (difficulty concentrating).
  10. Confusion, decreased consciousness or even loss of consciousness. Typically, it comes with lack of vision or blurred vision.
  11. Increased rhythm of your heart-beats. It’s quite possible for hypoglycemia to cause tachycardia (very fast heart-beats), especially if it lasts longer or left untreated.
  12. In severe case, hypoglycemia may lead to serious complication such as coma.

Causes of low blood sugar without diabetes

Again as mentioned before, low blood glucose typically occurs due to the excess insulin in the bloodstream. In diabetics, the improperly taking insulin replacement (too much insulin injected into the body) is often to blame. How about in non-diabetics?


  • d hueck

    After getting up this morning, I washed, I made porridge, put the washer on , tidied the lounge, then just as it had cooled, I ate the porridge (I added strawberries, two dried apricots and extra milk. About five minutes later, I felt terrible – really mentally tired, shaky, and too shattered to talk or do anything. I have felt like this before , it is a horrible feeling. I once had blood tested but a negative result was registered.Can you help please

    • doctorone

      #d hueck

      It’s difficult for me to make a conclusion. To keep safe, it’s much better to see your GP /doctor to find a completely evaluation and a complete guide of treatment plan you need to follow. There may be other thing than hypoglycemia behind the symptoms that you were experiencing. Thanks