Hypoglycemia (Low Blood Sugar): Symptoms & Signs

Medically Reviewed on 9/10/2019

Hypoglycemia (low blood sugar) means that blood levels of glucose are too low. This condition is most commonly a complication of treatment for diabetes. Symptoms of hypoglycemia vary among people. When blood sugar levels drop, symptoms can include

  • trembling,
  • anxiety,
  • palpitations (fast or pounding heartbeat),
  • sweating,
  • clammy skin, and
  • hunger.

These are among the early symptoms of hypoglycemia. Other possible symptoms of low blood sugar can be

  • dizziness,
  • lightheadedness,
  • chills,
  • nausea, and
  • lack of coordination.

If the low blood sugar levels persist, more serious symptoms develop, such as

  • headache,
  • confusion,
  • difficulty with thinking, and
  • seizures.

Eventually, coma may develop.

Causes of hypoglycemia

Hypoglycemia occurs as a side effect of many treatments for type 1 or 2 diabetes. There are other rare causes for the condition, such as insulin-producing tumors (insulinomas) and certain medications.

Related Symptoms & Signs

Other hypoglycemia symptoms and signs

  • Anxiety
  • Blurred Vision
  • Chills
  • Clammy Skin
  • Coma
  • Confusion
  • Delirium
  • Difficulty Thinking
  • Dizziness
  • Fainting
  • Fatigue
  • Hunger
  • Irritability
  • Lightheadedness
  • Loss of Coordination
  • Nausea
  • Nervousness
  • Numbness in Mouth or Tongue
  • Pale Skin
  • Palpitations
  • Racing Heartbeat
  • Seizures
  • Sensation of Abnormal Heartbeat
  • Shakiness
  • Slurred Speech
  • Sweating
  • Trembling
  • Tremor
  • Unresponsiveness
  • Unsteadiness

Medically Reviewed by a Doctor on 9/10/2019


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