In-depth

Causes

Diabetic hypoglycemia

Symptoms

Fatigue

Hyperglycemia in diabetes

Nausea and vomiting

Shortness of breath

Tachycardia

Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.

Tests and diagnosis

Blood urea nitrogen (BUN) test

A blood urea nitrogen (BUN) test is used primarily to diagnose kidney disorders. It can also be helpful in detecting other medical problems.

May 22, 2015