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Hypoglycaemia, or hypo for short, means low blood sugar. Most young people recognise being hypo when their blood sugar is less than 4mmol/l.

If you think you may be going hypo, you should ideally test your blood sugar by doing a finger prick test to check whether you are low. If you don’t have your testing kit close by, you should treat the symptoms anyway.

Your friends, teachers and family need to know about hypos because they can help you.

  • Exercise

  • Too much insulin

  • Not eaten enough carbohydrate

  • Stress, hot weather, alcohol

  • Hormones

  • Insulin at wrong time

  • Changing injection sites, eg. from area of lipohypertrophy


Diabetes - Hypo feeling irritable
  • Tiredness/fatigue

  • Hungry

  • Feel strange/faint/dizzy

  • Feel shaky/trembly/wobbly

  • Moody

  • Sweaty

  • Anxious

What you look like
  • Pale

  • Sweaty

  • Confused


Different types of hypo

We 'grade' hypos by how you feel, not the actual level of blood sugar, as this is different for everybody.

See page 19 of 'My diabetes' for more information.