Low Blood Sugar
Low blood sugar (hypoglycemia) happens when the amount of sugar in the blood falls below normal. It usually affects diabetic people who use medications that raise insulin levels in the body. It can be triggered by fasting or by the use of too much insulin medication.
Hypoglycemia can cause a variety of symptoms including heart palpitations. When this is the case, heart palpitations are often accompanied by other symptoms, such as dizziness and hunger.
If you have diabetes and start to feel the onset of heart palpitations, it may be a sign that your blood sugar is low. Low blood sugar [4] can be dangerous if not treated quickly. Fortunately, consuming sugary drinks and snacks rich in glucose can usually help you counter it.