Hypoglycemia, or low blood sugar, occurs mostly in diabetics. It's not as common in people who don't have diabetes, but may happen. Hypoglycemia in people without diabetes can happen suddenly and it's usually mild. It can be treated quickly and easily by eating or drinking a small portion of glucose-rich food.

Possible causes: 

  • Medications such as monoamine oxidase inhibitors (MAOIs), quinine and aspirin.
  • Drinking too much alcohol.
  • Extraneous exercise.
  • Diseases that affect the pancreas, liver, kidneys or adrenal glands such as hepatitis, kidney disease and anorexia.
  • Genetic metabolism problems.

Hypoglycemia causes symptoms such as:

  • hunger
  • nausea
  • jitters
  • nervousness
  • sweating
  • dizziness
  • sleepiness
  • confusion
  • blurry vision
  • difficulty speaking
  • anxiety
  • weakness
  • rapid heart beat
  • cold, clammy feeling

Hypoglycemia can occur during sleep. Some signs of hypoglycemia during sleep:

  • wake up tired or with a headache
  • nightmares
  • night sweat which dampens pajamas or sheets
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