Signs of High and Low Blood Sugar

You can manage diabetes and avoid dangerous highs and lows in your blood sugar

Symptoms of hyperglycemia (high blood sugar)

Symptoms from hyperglycemia usually do not occur until blood sugar is very high (200 mL/dL). Sometimes the symptoms develop slowly, over several days or even weeks.

  • Increased thirst
  • Frequent urination
  • Headache
  • Tired or Sleepy
  • Blurry vision

If high blood sugar goes untreated, symptoms can worsen and become very dangerous. It’s important to seek care with a doctor or nurse practitioner. Examples of these more dangerous symptoms are:

  • Nausea and vomiting
  • Fruity smelling breath
  • Confusion
  • Shortness of breath
  • Weakness
  • Abdominal pain
  • Coma

Symptoms of hypoglycemia (low blood sugar)   

Hypoglycemia is when your blood sugar drops below 70.

Low blood sugar (hypoglycemia) can happen for any of these reasons:

  • Taking too much insulin
  • Taking too much oral medication
  • Skipping a meal
  • Exercise

Low blood sugar is dangerous. If left untreated, you can pass out

It’s important to know the signs and symptoms of low blood sugar:

  • Feeling shaky
  • Feeling dizzy
  • Headaches
  • Hunger
  • Irritability
  • Nervousness

Need help finding a Primary Care Provider to help manage your diabetes? Search online or call 740-779-FIND (3463).


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