Diabetes Health Center

Initial signs that the blood sugar is high can include the following:

  • being very thirsty
  • feeling hungry
  • fatigue
  • blurry eyesight
  • losing feeling or feeling tingling in your feet
  • losing weight without trying
  • frequent urination

Additional signs that blood sugar is very high may include the following:

  • deep, rapid breathing
  • dry skin and mouth
  • flushed face
  • fruity breath odor
  • nausea or vomiting, inability to keep down fluids
  • stomach pain

Both patients with type 1 diabetes and those with type 2 diabetes may experience these symptoms. People with type 2 diabetes often have no symptoms at first. They may not experience symptoms for many years.

Other symptoms of diabetes may include the following:

  • bladder, kidney, skin or other infections that are more frequent or heal slowly
  • erectile dysfunction
  • pain or numbness in feet or hands
Review Date: 
August 13, 2012
Last Updated:
September 12, 2014