Signs of High Blood Sugar

Feeling very thirsty is a common early sign of a high. You may drink more and still feel dry.

Going to the bathroom more often is another common early sign. These two are early signs.

They work like a dashboard light that comes on before the car stalls. Notice them.

Blurred vision, tiredness and headaches can also point to high blood sugar. Blurred vision means things look fuzzy, like a photo that is out of focus. Each one can also come from other things, so it is easy to overlook them. A sign that shows up with thirst or bathroom trips deserves a closer look.

Some people feel no symptoms, even when sugar stays high for a long time. Feeling fine does not prove your numbers are fine.

Keep a log of your readings. Share repeated high readings with your care team. They help plan your diabetes care.

A sensor report chart from midnight to midnight with a shaded target range. First one day's line crosses it, then several days are stacked on top of each other. A shaded band shows the usual day, and an amber ring marks a high after the evening meal that repeats.

Key takeaways

• Feeling very thirsty and going to the bathroom more often are common early signs of a high.
• Blurred vision, tiredness and headaches can also point to high blood sugar.
• Feeling fine does not rule out a high, so a written log of readings is worth keeping.

Try it

This week, jot down any thirst, bathroom trips, blurred vision or tiredness, with the date.