Diabetes Management

Hypoglycaemia: Know What Happens When Your Blood Sugar Drops!

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By Apollo 24|7, Published on - 20 January 2023, Updated on - 22 February 2024

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Have you ever experienced a sudden drop in your energy levels leaving you all weak and shaky? It can be hypoglycaemia. Hypoglycaemia is a medical condition characterized by lower-than-normal blood sugar levels. While it is more common in diabetics, it can happen in healthy people too. When a person with diabetes mellitus lacks sufficient glucose in their blood, they develop diabetic hypoglycaemia. However, in non-diabetics hypoglycemia can occur due to some underlying medical conditions or food habits. Let us know more about the condition and how to recognise it.

What is the blood sugar level in hypoglycaemia?

A fasting blood sugar level (in the morning before eating anything) of 99 mg/dL or less is considered normal. However, blood sugar levels of less than 70 mg/dl would be considered hypoglycaemia.

How do you know if you have low blood sugar?

Symptoms of hypoglycaemia can range from short-term effects like disorientation and light-headedness to more severe ones like convulsions, coma, and even death, in extreme cases. Some typical symptoms that you may face include:

  • Hunger
  • Shakiness and sweating
  • Anxiety or irritability
  • Difficulty concentrating
  • Light-headedness
  • Vision problems
  • Slurred speech
  • Clumsiness
  • Sleep disturbances

It must be noted that severe hypoglycaemia can result in seizures and loss of consciousness. Therefore, people must consult a doctor if they experience any of the signs mentioned above.

Why is my blood sugar level low?

The causes of hypoglycaemia can be different in diabetics and non-diabetics. Diabetics can have low blood sugar levels due to:

  • Not eating enough carbs to metabolise the amount of insulin taken
  • Skipping meals
  • Consuming alcohol
  • Taking too much insulin
  • Increased physical activity without changing your diet or diabetes medication

For non-diabetic people, the causes of hypoglycaemia can be:

  • Intake of antibiotics and medicines for malaria and pneumonia
  • Hypothyroidism (low thyroid hormone levels)
  • A side effect of weight loss surgeries
  • Liver or kidney problems
  • Excessive alcohol consumption

What is the treatment for hypoglycaemia?

Hypoglycaemia should be treated immediately to prevent severe complications. One must start with the 15-15 rule, which includes:

  1. Eat or drink 15 grams of something sweet, like dextrose tablets or fruit juice, to raise your blood sugar.
  2. Check your blood sugar after 15 minutes, and if it's still low, eat something sweet again.

Severe hypoglycaemia can lead to loss of consciousness. This is an emergency situation that would require immediate medical intervention. Do not try to feed an unconscious person as it could cause them to choke.


1. What is a common test for hypoglycaemia?

Your doctor will check your blood sugar levels at various times of the day to notice any pattern. A blood test would be recommended to check your insulin levels and rule out other conditions that may cause hypoglycaemia.

2. Is there a special diet I should follow for hypoglycaemia?

It is advised to consume small meals every 3 to 4 hours throughout the day. Consuming vegetables, non-meat protein, nuts, dairy, and whole grains will assist in keeping blood sugar levels within the limits.

3. Can stress cause hypoglycaemia?

Sometimes, long-term stress may cause changes in blood sugar levels, increasing the risk of hypoglycaemia.

4. Can hypoglycaemia occur without diabetes?

Yes, hypoglycaemia can be seen in healthy individuals too.

5. What food to avoid if I have hypoglycaemia?

You should not consume foods with high fibre or high fat as they slow down the rate at which sugar is absorbed by the body.

Hypoglycaemia when left untreated, can cause long-term damage. If you experience a drop in your sugar levels too often, don't wait to consult a diabetologist to determine the underlying reason.

Talk To An Apollo Diabetologist

You can also try the Apollo 24|7 Diabetes Self-Management Tool to log your sugar values, track patterns, know all about food nutrition and more.

Medically reviewed by Dr Sonia Bhatt.

Diabetes Management

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