High blood sugar

High blood sugar or hyperglycaemia (‘hyper’ for short) can make you:

  • very thirsty
  • feel tired
  • need to wee more often, especially at night
  • prone to infections.

Treating high blood sugar

If your blood sugar levels are above what you’ve agreed with your diabetes team, there are things you can do to bring them back to normal.

  • Look at what you’re eating. Are you having too much carbohydrate in meals or snacks?
  • If you have type 2 diabetes and feel well, go for a walk or move about more.
  • If you have type 1 diabetes, your sugar level’s 14mmol/l or more and you feel unwell, check your urine or blood for ketones. Follow your sick day rules if the result’s positive.
  • Drink plenty of water.

If you’re on certain medicine and you’ve been given a blood glucose meter, it’s a good idea to check your levels regularly throughout the day.

If you get an abnormal reading you should check your levels more often during the day. If it stays too high, check your carbohydrate portion sizes and activity levels, then make some changes. If that doesn’t help, contact your diabetes team.


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