What is low blood glucose (sugar)?

Low blood glucose, or low blood sugar, is called hypoglycemia. It is when your blood glucose is below 70 mg/dL. 

Low blood glucose should be treated right away. 

Your blood glucose might be low if you:

• are dizzy or have headaches

• have weakness or fatigue (feeling tired)

• are shaking, sweating, or have a fast heartbeat

• have vision changes

• are feeling anxious or irritable 

• are hungry

If you think your blood glucose level is too low, use a blood glucose meter to check it.