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What you need to know about low blood sugar (Hypoglycemia)

Dr. Priya Sammani (MBBS)
Medically Reviewed by Dr. Priya Sammani (MBBS) ✓ Medically Reviewed
📅 Updated: Jul 7, 2026 • ⏱ 6 min read • Editorial Policy
What you need to know about low blood sugar (Hypoglycemia)
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Sometimes you may have felt that when you miss a meal, you suddenly feel weak, your limbs start to tremble, and your head feels dizzy. You also feel a little anxious and angry. This is your body's signal that you don't have enough sugar. In medical terms, we call this condition 'hypoglycemia'. Simply put, this means that the blood sugar level drops dangerously low.

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What is hypoglycemia?

Glucose, or sugar, from the food we eat is our body's main source of energy. It's like gasoline for a car. A healthy person's blood sugar level should normally be between 70 and 99 milligrams per deciliter (70 to 99 mg/dL).

Often, when a healthy person experiences these symptoms, eating a carbohydrate-rich food, such as an apple or banana, will bring their blood sugar levels back to normal.

However, this condition can be very dangerous for someone with diabetes. Also, even for someone without diabetes, if the blood sugar level continues to decrease, it can lead to serious conditions such as blurred vision, confusion, or loss of consciousness. Therefore, it is very important to bring the blood sugar level back to normal as soon as possible.

What to do immediately when your blood sugar drops

Imagine you have the symptoms mentioned earlier. Then you need to get your blood sugar levels back to normal as soon as possible. Here are some foods that contain about 15 grams of carbohydrates to help with that.

Food Amount to take
Apples, bananas or oranges A small tumor
Grapes About 15 nuts
Raisins 2 tablespoons
Dried dates (Prunes) A few nuts
A bagel Half
Granola Half a cup

Eating one of these foods will provide you with the amount of carbohydrates you need to rebalance your blood sugar levels.

Be especially careful if you are diabetic!

If a person taking medication for diabetes does not eat properly after taking the medication, exercises more than usual, or takes too much insulin or diabetes medication, their blood sugar levels can drop.

If you have a hypoglycemic episode, use what's called the "15-15 rule." This is very important.

1. Step 1: Eat or drink something with 15 grams of carbohydrates.

2. Step two: Wait 15 minutes.

3. Step Three: Check your blood glucose level.

4. Step Four: If it's still below 70 mg/dL, take 15 grams of carbohydrates again.

Your goal should be to raise your blood glucose level to at least 70 mg/dL.

Ways to get 15 grams of carbohydrates quickly
Half a cup of fruit juice or a regular (non-diet) sweetened beverage.
A tablespoon of honey or sugar.
Sweet treats like toffee and jelly beans (check the label to see how much you should eat).
Glucose tablets or gel (follow the instructions on the package).

But remember , don't eat a lot all at once just to feel better. Doing so can cause your blood sugar levels to suddenly spike too high.

Can someone without diabetes develop this condition?

Yes, it definitely can. Just like if you're fasting, if you eat too late in the day, your blood sugar levels can drop.

Another thing is that for some people, this condition occurs about 4 hours after eating. We call this 'reactive hypoglycemia' . Also, if you eat a lot of simple carbs like bread, rice, and pasta all at once, your body will suddenly produce a lot of insulin to control that sugar. As a result, your blood sugar levels can drop suddenly.

So what should be done to prevent this?

These tips will help you prevent low blood sugar levels for both of these reasons:

  • Eat small, frequent meals: Eating a small meal or snack every 3-4 hours throughout the day can help keep blood sugar levels stable.
  • Develop healthy eating habits: Be sure to include a variety of fruits, vegetables, fiber, and lean protein in your diet. These will give you long-lasting energy and prevent your blood sugar levels from dropping suddenly.
  • If you eat something sweet, eat it as part of a balanced meal: Eating it with a main meal can help control the sudden spikes in blood sugar levels, rather than eating it alone.
  • Limit caffeine: The effects of caffeine, found in things like coffee and tea, can be similar to the symptoms of hypoglycemia. Therefore, it is wise to limit your intake of these.
  • Limit or stop drinking alcohol: Alcohol can cause hypoglycemia. This risk is especially high if you drink alcohol on an empty stomach. If you drink alcohol, limit it. Limit to one serving per day for women and two for men. Never drink alcohol on an empty stomach.

If you have any further questions about this, or if these symptoms occur frequently, it's always best to see your doctor for advice. That's the best thing you can do.

💡 Take-Home Message

  • Hypoglycemia is a condition in which the blood sugar level drops too low. The main symptoms include shakiness, dizziness, and nervousness.
  • As a quick fix at times like this, eat something that has about 15 grams of carbohydrates, like a banana or some fruit juice.
  • If you are diabetic, be aware of the "15-15 rule." Always keep something sweet nearby that can quickly restore your blood sugar levels.
  • This condition can also occur in people without diabetes. To prevent it, eat balanced meals at the right times.
  • If these symptoms occur frequently or are severe, be sure to see your doctor to find the cause.
Hypoglycemia, Diabetes, blood sugar, symptoms of low blood sugar

❓ FAQ

Frequently Asked Medical Questions (FAQ)

Evidence-based clinical answers to common patient questions

What is hypoglycemia?

Glucose, or sugar, from the food we eat is our body's main source of energy. It's like gasoline for a car. A healthy person's blood sugar level should normally be between 70 and 99 milligrams per deciliter (70 to 99 mg/dL).

What to do immediately when your blood sugar drops?

Imagine you have the symptoms mentioned earlier. Then you need to get your blood sugar levels back to normal as soon as possible. Here are some foods that contain about 15 grams of carbohydrates to help with that.

What should you know about Be especially careful if you are diabetic!?

If a person taking medication for diabetes does not eat properly after taking the medication, exercises more than usual, or takes too much insulin or diabetes medication, their blood sugar levels can drop.

Can someone without diabetes develop this condition?

Yes, it definitely can. Just like if you're fasting, if you eat too late in the day, your blood sugar levels can drop. Another thing is that for some people, this condition occurs about 4 hours after eating. We call this 'reactive hypoglycemia' . Also, if you eat a lot of simple carbs like bread, rice, and pasta all at once, your.

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⚠️ Important: Medical articles and information on Nirogi Lanka are strictly for educational and awareness purposes and do not substitute professional medical advice, diagnosis, or treatment. Always consult a qualified physician for any medical concerns.