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Type 1 Diabetes

Why Some People Stop Feeling Lows — and How to Get Back

· 3 min read · Reviewed by GlucIQ Clinical Review Workflow
#hypoglycemia#hypoglycemia-unawareness#cluster:hypo-biology

You used to feel lows coming — the shakiness, the sweat, the fog. Now, sometimes you just look at your CGM and you’re at 55. No warning. It’s like your body’s alarm system went quiet.

That’s not a fluke. It’s a real condition called impaired awareness of hypoglycemia — and it happens to people who have lots of lows.

What’s happening

Your body learns. When you go low frequently, your body stops sounding the alarm — it gets used to the danger. The researchers who study this are blunt: hypoglycemia is the biggest barrier to good control, and losing your warning signs makes it worse (Cryer, 2011).

It’s not your fault. It’s your body adapting to repeated lows. But it needs attention — because if you can’t feel a low coming, you can’t treat it in time.

The dangerous part

The people who stop feeling lows are at higher risk of severe lows — the kind that need help, or that happen at night without you waking.

And here’s the part that surprises people: the fix isn’t aiming higher forever. It’s avoiding lows for a while so your alarm system can come back online.

How to get your warnings back

1. Stop the lows for a while — carefully. The research is clear: a period of avoiding lows — even if it means running a bit higher — lets your body’s alarm system recover (Cryer, 2011). This is a plan to make with your care team, not solo.

2. Raise your targets temporarily. Sometimes that means accepting a higher range for 2-4 weeks. It’s a trade — a few weeks of higher numbers to get your safety system back.

3. Use the CGM’s low alarms. Set a higher low alert (like 80) so you catch the drop before it’s a real low. A warning you hear is worth more than a symptom you no longer feel.

4. Review your night data. Many people lose awareness first at night. If your nights show lows you don’t remember, that’s the priority.

What NOT to do

  • Don’t “tough it out.” Unfelt lows are not a badge of honor — they’re a risk.
  • Don’t tighten targets while you can’t feel lows. That’s the setup for a severe event.
  • Don’t assume it’s permanent. It’s reversible for most people.

The one-minute takeaway

Losing your low warnings is real, it’s common, and it’s fixable. The fix is counterintuitive: stop the lows — even if it means running higher for a bit — so your body trusts its alarm again. That’s a conversation for your care team, and it’s one of the most important ones you can have.

References

  • Cryer PE. Hypoglycemia in Type 1 Diabetes Mellitus. Endocr Dev. 2011;21:70-77. DOI: 10.1159/000328136
  • Battelino T, et al. Clinical Targets for CGM Data Interpretation: International Consensus on Time in Range. Diabetes Care. 2019. DOI: 10.2337/dci19-0028