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Diabetes Management November 3, 2026 SweetLife Team

Hypoglycemia Unawareness: When You Can’t Feel Your Lows

Most lows announce themselves: shakiness, sweating, a pounding heart, sudden hunger. Those signs are your body telling you to eat. For some people with diabetes, especially after many years or many lows, the warning gets quieter or disappears, and the first sign of a low is confusion. That is called impaired awareness of hypoglycemia, or hypoglycemia unawareness. It is common, it raises the risk of serious lows, and it can often improve.

This article is general education, not medical advice. If you think you are not feeling your lows, talk to your care team.

What It Is

The American Diabetes Association defines impaired hypoglycemia awareness as not experiencing the usual release of counterregulatory hormones at low glucose levels, or the symptoms that come with it. It often occurs in people who have had diabetes for a long time or who have frequent lows. The ADA notes that confusion may be the first sign of a low, which can create real fear of hypoglycemia and affect quality of life.

How Common It Is

Roughly one in five adults with type 1 diabetes. In a study of 518 randomly selected adults with type 1 diabetes at a hospital clinic in Edinburgh, 19.5% had impaired awareness. They tended to be older and to have had diabetes longer: a median of 23 years, against 14 years for those who could still feel their lows.

Why It Matters

Without warning signs, a low can become severe before anyone notices. The ADA calls this a dramatic increase in the risk of level 3 hypoglycemia — a low severe enough that you need someone else’s help to treat it. In a year-long study of 60 people with type 1 diabetes, 66% of those with impaired awareness had at least one severe low, against 26% of those with normal awareness, and the rate of severe lows was six times higher. The Edinburgh study found the same sixfold difference.

Signs You Might Have It

The ADA recommends screening at least once a year, and suggests two simple questions:

There are validated questionnaires too, such as the Gold and Clarke scores, which your care team may use. In everyday life, the clues are CGM alarms for lows you did not notice, and the people around you spotting that you are low before you do.

Can Awareness Come Back?

Often, yes. The ADA notes that several weeks of avoiding lows can improve awareness and the body’s response to low glucose in many people, which is why a care team may relax your glucose targets for a while. It also recommends referring people with impaired awareness to a trained health professional for an evidence-based program to help bring the warning signs back.

Do not raise your targets on your own, though. How far, and for how long, is a decision to make with your care team.

How a CGM Helps

If you cannot feel a low, a CGM alarm can do the feeling for you. In the HypoDE trial, 149 adults with type 1 diabetes on multiple daily injections, all with impaired awareness or a recent severe low, were randomly assigned to real-time CGM or to fingersticks alone for six months. In the CGM group, low glucose events fell from 10.8 to 3.5 per 28 days — a 72% reduction — while the fingerstick group barely changed. (The trial was funded by Dexcom, which made the CGM used.)

The ADA adds that CGM with automatic insulin suspension, and automated insulin delivery systems, have been shown to reduce lows in type 1 diabetes.

Build Your Safety Net

One curious footnote: in a small study of people with type 1 diabetes, a daily dose of caffeine made the warning symptoms of lows stronger. It is not a treatment, but it is a nice surprise for coffee drinkers — more in our article on coffee and blood sugar.

Where SweetLife Fits

With SweetLife’s family sharing, someone you trust can get an alert when your glucose goes low, which is a real safety net when you might not feel it yourself. Insights shows how often you go below 70 mg/dL and at what times of day, so you and your care team can see where the lows cluster and work on them together.

The Short Version

About one in five adults with type 1 diabetes no longer feels the usual warning signs of a low, and it makes severe lows about six times more common. Ask yourself whether you have lows without symptoms, and tell your care team if so. Weeks of avoiding lows can bring awareness back for many people, and a CGM with alerts — plus glucagon and people who know how to use it — makes the gap much safer in the meantime.

Sources

Medical Disclaimer: This article is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or qualified healthcare provider with any questions about a medical condition or changes to your diabetes management plan, including medication and insulin dosing. SweetLife is a tracking and logging tool, not a medical device, and does not provide medical advice.

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