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type 1 diabetes information

Low Blood Sugar: Definition, Symptoms

Low blood sugar (hypoglycemia) is the most common and most dangerous condition for many people with type 1 diabetes. Very low blood sugar may lead to insulin shock, which can be life threatening if not promptly treated. Low blood sugar occurs when the body has too little food/glucose or too much insulin.

The following are all potential reasons that a person with diabetes might have low blood sugar:

  • Too much insulin taken
  • Eating less than usual
  • Eating later than usual
  • Insulin was injected at a site on the body where the absorption rate is faster than usual
  • Injecting extra insulin after forgetting about a previous dose
  • More exercise than normal
  • Illness or injury
  • Other hormones
  • Medication interaction

The following is a list of general symptoms that indicate low blood sugar (the person with type 1 diabetes may exhibit one or more of these):

  • Dizziness
  • Nervousness
  • Personality change/irrational behavior
  • Blurry vision
  • Shakiness
  • Nausea
  • Crying
  • Sluggishness
  • Sweating
  • Poor coordination
  • Hunger
  • Lightheadedness
  • Irritability
  • Drowsiness
  • Erratic response to questions
  • Inability to concentrate

Severe symptoms (symptoms as listed above, plus):

  • Convulsions
  • Unconsciousness


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