Why are blood sugar levels swinging from high to low so quickly?
Rapid swings between high and low blood sugar can feel alarming, but there are several common reasons this happens with diabetes. Here are some possible causes:
- Too much insulin or medication — Taking too high a dose can drop blood sugar quickly after it Show Full Answer
Why are blood sugar levels swinging from high to low so quickly?
Rapid swings between high and low blood sugar can feel alarming, but there are several common reasons this happens with diabetes. Here are some possible causes:
- Too much insulin or medication — Taking too high a dose can drop blood sugar quickly after it was high
- Eating high-carb foods — Carbs spike blood sugar fast, and then insulin (or medication) can bring it crashing down
- Stress — Stress hormones like cortisol and adrenaline can raise blood sugar suddenly, followed by a sharp drop
- Timing of meals and medication — Mistiming insulin around meals is a common trigger
- Exercise — Physical activity can cause blood sugar to drop after a high reading
It's also worth noting that if the reading seems to change within literally one minute, your glucose meter may be giving inconsistent results. Things like finger choice, blood sample size, or a faulty strip can cause different readings back to back.
The best step is to track these swings and share the pattern with your doctor. They can adjust your diabetes management plan to help smooth things out. Frequent low blood sugar episodes especially need prompt attention, as they can become serious over time.
August 14
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