You may have these
symptoms when your blood sugar has dropped below 70
milligrams per deciliter (mg/dL). When you have had
diabetes for many years, you may not always develop symptoms of mild low blood
young children with
diabetes cannot recognize symptoms of low blood sugar.
Others can, but not every time. To be safe, the parents need to do a home blood
sugar test whenever they suspect low blood sugar in a child.
Symptoms may include:
Sweating (almost always present). Check for
sweating on the back of your neck at your hairline.
shakiness, and weakness.
Extreme hunger and slight
Dizziness and headache.
A fast heartbeat and feeling anxious.
These symptoms may go away shortly after you eat food that
Symptoms of moderate low blood sugar
If your blood sugar continues to drop (below 40 mg/dL), your
behavior may change. Symptoms may include:
Inability to concentrate.
standing or walking.
changes, such as anger or crying.
Symptoms of severe low blood sugar
Symptoms of severe low blood sugar (usually below 20 mg/dL)
Loss of consciousness
Signs of low blood sugar at night
If your blood
sugar drops while you are sleeping, your partner or other family members may
notice that you are sweating and behaving differently. Signs of low blood sugar
at night (nocturnal hypoglycemia) include:
Attempting to get out of bed or accidentally rolling out of
You may wake up with a headache in the morning if your
blood sugar was low during the night.
Signs of hypoglycemic unawareness
Some people have no symptoms of low blood sugar. The only symptom you may have is confusion. Or you may become unconscious before anyone realizes you have low blood sugar.
You may have hypoglycemic unawareness if you:
Cannot tell by your symptoms that your blood sugar is low.
Have low blood sugar several times a week.
Have type 1 diabetes, or have had type 2 diabetes for a long time.
If you have hypoglycemic unawareness, test your blood sugar often, especially before activities like driving a car. Keep quick-sugar foods with you. If you take insulin, carry a glucagon emergency kit. You can also give friends and family instructions to treat low blood sugar.
How this information was developed to help you make better health decisions.