What Is Hypoglycemia Unawareness?

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What is hypoglycemic unawareness is a topic very dear to my heart. This is because our 6-year-old type 1 diabetic grandchild is hypoglycemic unaware.

What this means is that he does not recognize the symptoms within his body of hypoglycemia.

To compensate for this, his parents (and us when he is with us) must check his blood sugars more frequently to catch any lows before they become serious.

I was very surprised to learn that one in five people living with type 1 diabetes and one in ten experiencing insulin-treated type 2 diabetes report having experienced hypoglycemia unawareness.

I find these to be scary statistics.

I know with our grandson we are trying to get him to notice what he feels like when he tests low.

Occasionally, he can now feel low if it is a sudden drop but by no means can we depend on Alex to let us know he “feels low”. It just doesn’t happen regularly.

So let’s take a closer look at…

What is hypoglycemia?What Is Hypoglycemic Unawareness? - diabetes testing supplies

Hypoglycemia is when blood sugars drop too low.

When someone has diabetes, managing blood sugar levels is an unrelenting battle.

It is important to note that hypoglycemia can occur at any time but can often be a result of not eating meals on time, taking too much insulin for the amount of food eaten, or more exercise than planned for.

Especially dangerous is the fact that hypoglycemia can even occur at night while the person is sleeping.

Yes, our grandson needs to have his blood sugars checked frequently at night. Yes, he has had to be awakened for a snack or juice in the night.

My daughter has not had a full night’s sleep since Alex was diagnosed a year and a half ago at age four.

Yes, we have taken him for sleepovers but she is still up awaiting my text with his numbers at the specified times so it really isn’t much of a break for her.

Symptoms of Hypoglycemia?

There are actually three levels of hypoglycemia and several telltale symptoms to watch for.

Level 1 (mild)

  • blood glucose (sugar) is less than 70 mg/dL but more than 54 mg/dL
  • symptoms can include sweating, shaking, nausea, extreme hunger, nervousness, dizziness

Level 2 (moderate)

  • blood glucose is less than 54mg/dL
  • symptoms include those above as well as difficulty concentrating or speaking, confusion, weakness, vision changes, mood swings

Level 3 (severe)

  • the person is unable to function due to the mental and/or physical changes
  • the person is unable to treat the low themselves and requires immediate assistance, They may be unconscious or have seizures. They will need to be treated with a Glucagon Emergency Kit.

What Is Hypoglycemic Unawareness? - Glucagon kit

Some people experience all of these symptoms and some people only a few.

Because untreated hypoglycemia can lead to seizures and/or death it is considered a medical emergency.

Mild to moderate cases may be treated at home by taking fast-acting sugar snacks or juice.

In severe cases treat with a Glucagon emergency kit and call 911(or the equivalent emergency number for your area) they will require hospitalization.

What is Hypoglycemia Unawareness?

While most diabetics know when they are low, others struggle to detect it or may even be completely unaware as with our grandson Alex.

‘Hypoglycemia unawareness’ or ‘impaired awareness of hypoglycemia’ occurs when someone either doesn’t experience or doesn’t recognize the symptoms of hypoglycemia.

Some people feel and wake in the night if their sugars drop too low.

Alex does not so his parents(or me if he is with us) must check his blood glucose throughout the night and wake him to treat a low if necessary.

This can be really scary as he can be very difficult to wake when he is low. Thankfully we have not had any severe hypo events yet.

Studies show that people with hypoglycemia unawareness have a significantly higher risk of experiencing ‘severe hypoglycemia’ because they are less likely to recognize the early symptoms such as shakiness, hunger, or sweating.

What causes hypoglycemic unawareness?

There are several possible causes of hypoglycemic unawareness.

One possible cause could be that nerve damage may affect the body’s ability to secrete epinephrine. Sometimes type 1 diabetics develop impaired epinephrine secretion.

Another possibility could be the result of very tight blood sugar control. This can dull the body’s ability to feel a drop in blood sugar. Sometimes, if you maintain slightly high blood sugar levels for a period of time can improve your ability to detect low blood sugar.

As always with anything diabetes-related, it is an important topic to discuss with your diabetes care team.

Am I hypoglycemic unaware?

Several factors can increase your risk of becoming hypoglycemic unaware.

Going low while sleeping

What Is Hypoglycemic Unawareness? - sleeping

Many diabetics develop hypoglycemia while they are sleeping making them unaware of their symptoms and unable to treat the low.

If this happens frequently, it can affect the person’s ability to detect and recognize the symptoms while awake


Exercise can make the body’s tissues more sensitive to insulin which can increase the chances of hypoglycemia both during and after exercise.

Exercise can still affect blood glucose levels for up to 15 hours after exercise has stopped, particularly with strenuous exercise.

Having diabetes for a long time

In one study, 50% of people who had been using insulin for 20 or more years, developed hypoglycemia unawareness.

This is in contrast to only 20% of those using insulin for 10 years or less experienced hypoglycemia unawareness.

This could be because people who have had diabetes longer have experienced more hypoglycemic events which have been shown to contribute to hypoglycemia unawareness.


Many people begin to experience ‘cognitive decline’ as they age. They begin to exhibit cognitive symptoms like slowed thinking, confusion, and difficulty speaking while also experiencing autonomic symptoms like shakiness, hunger, or sweating, making it difficult to recognize as hypoglycemia.

At younger ages. most people recognize hypoglycemia more frequently because they experience autonomic symptoms before cognitive symptoms.

There is no precise age that this cognitive decline begins to take place.

Some studies indicate hypoglycemia unawareness is more frequent in those over the age of 60.

Consuming AlcoholWhat Is Hypoglycemic Unawareness? - alcoholic beverages

Excessive alcohol consumption can significantly reduce your ability to recognize hypoglycemic symptoms.

It can also impair the liver’s ability to release glucose when your blood is too low.

These effects can last for as long as it takes the body to process the alcohol.

There is no evidence suggesting that alcohol increases hypoglycemia unawareness in the long term unless chronic, heavy drinking has led to permanent liver damage. That would increase the risk of severe hypoglycemia.

Can it be reversed?

Research shows that it is possible to reverse hypoglycemia unawareness by avoiding frequent lows.

Preventing all lows for two weeks resulted in increased symptoms of low blood sugar and a return to nearly normal symptoms after 3 months.

In the case of our grandson, he is young and has not yet learned to read his body’s symptoms. By asking him to describe how he feels when he is low or high we hope to teach him to begin to recognize symptoms.

We have had some success. Recently, he told us he felt low and when checked he had dropped quite quickly.

How can I prevent hypoglycemia unawareness?

It is possible to avoid developing hypoglycemia unawareness by diligently following your diabetes care plan as determined by your diabetes care team.

Frequently monitor blood glucose

When you frequently monitor blood glucose levels, it is possible to identify potential hypoglycemia which significantly reduces the risk of developing severe hypoglycemia without warning.What Is Hypoglycemic Unawareness? - diabetes supplies


When you wear a CGM (continuous glucose monitor) makes it easier to frequently monitor blood glucose levels.

Some CGM’s have alarms to alert you when your levels drop to low.

Be sure you check with your insurance provider as some providers only cover certain brands.

Our grandson can only wear one particular type of CGM because that is what his parent’s medical insurance covers.

Unfortunately, he does not have alarms so our daughter wakes frequently through the night to scan Alex’s levels and treat lows if necessary.

Insulin therapy

It is important that you take your insulin exactly as your diabetes care team has prescribed.

You can take insulin by a traditional syringe, pen needle, or insulin pump.

Our grandson takes his long-lasting insulin early in the morning through a pen needle.

He also has his regular insulin with each meal based on the number of carbs he eats.

Of course some days there are times he requires additional insulin adjustments.

For Alex, that is a minimum of four needles every day.

He is such a little trooper to just take it all in stride and never complain.

Final Thoughts

Because of our grandson, Alex, I needed to understand what is hypoglycemia unawareness.

Initially, I thought Alex couldn’t feel his lows because he was so young and wasn’t familiar with reading his body’s symptoms.

You can imagine my surprise when I learned it is so much more than and that so many are affected by it.

Hypoglycemia unawareness may be caused by nerve damage or by maintaining extremely strict blood glucose management.

Several things can contribute to experiencing hypoglycemia unaware such as:

  • frequently going low while sleeping
  • exercise
  • having diabetes for a long time
  • age
  • consuming alcohol

You can reverse hypoglycemia unawareness by avoiding frequent lows and paying close attention to how your body feels at various blood sugar levels.

In my books prevention is always better so focus on preventing hyperglycemia unawareness by checking blood glucose frequently and treating lows before they become serious.

Discuss wearing a CGM with your health care team. It may the frequent blood sugar checks much easier and some models have an alarm to alert you to potential lows.

Take your insulin and any other meds as directed by your doctor.

An insulin pump may be worth discussing with your diabetes care team.

I am not in any way a medical practitioner, please do not rely on the information on our website as an alternative to medical advice from your doctor or another healthcare provider. We only share our experiences.

Have you or someone you know experienced hypoglycemia unawareness?

Were you able to reverse it?

What measures do you take to prevent developing it?

I would love to read your answers or suggestions in the comment section below.

Take care and stay safe.

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4 thoughts on “What Is Hypoglycemia Unawareness?”

  1. I have known two people with Hypoglycemic Unawareness. My dad and a co-worker. The co-worker would fall out when his blood sugar levels went too low and we would pour Mtdew down him to get him back. He was a lifetime diabetic that did not take care of himself very well. I am surprised that he is still around 20 years later.
    My dad, on the other hand, had Pancreatitis when he was 70 and had his pancreas removed. He was on insulin for the rest of his life, 21 years. During this time he would have episodes of low blood sugar, you would always look for the signs when you were around him. I got used to it and did not think that others would have trouble noticing this type of problem. My dad would not be able to just tell us he was in trouble, you had to look for the signs.
    Making someone aware of your medical issues is very important if you are around new people. I don’t think my dad could always tell if his sugar level was getting too high. It was up to others to observe.
    Do you think they will make a wearable that can detect a low in the future?

    • Thanks for dropping by John and taking the time to share your experiences. Sorry to hear about your Dad, he was lucky to have you around to be able to watch for signs and give him the help he needed. Unfortunately, your co-worker is not alone in not taking care of his diabetes, so many don’t and I will never understand that. I prefer to be the healthiest I can be and try to make healthy choices the majority of the time. Of course, I do indulge at times but those are treats, not the norm. You are so right, it is extremely important to advise co-workers of any medical issues that you may need their assistance with. Take the time to educate them on what to do for you in an emergency. As for a wearable device. They do have CGM’s(continuous glucose monitors) and some models do have alarms to alert you to low blood sugars. Our grandson wears one but his does not have the alarm. Fortunately, he is still young enough he always has adults around him who can check him frequently and look for signs of low blood sugars.

  2. Thank you so much for this eye-opening post. I had no idea what Hypoglycemic Unawareness was before reading this article. I don’t know anyone who has Hypoglycemic Unawareness, but I expanded my knowledge about the topic. Thanks 🙂

    • Thanks for dropping by Delyana, and taking the time to comment. Hypoglycemia unawareness affects mostly type 1 diabetics and simply means they can’t feel when their blood sugars are going low. By testing their blood sugar levels frequently they can often catch a low before it gets too serious. The more we know and understand about diabetes and it’s complications makes us better able to help family and friends when needed. Take care,


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