Love is not the only reason for sugary hearts. High blood sugars or diabetes could also be the reason for the same. Unlike candy hearts of love diabetes always means catastrophic consequences.
High blood sugar or diabetes is a complex problem and is usually due to the inability of the body to utilize sugar or glucose. As a result, blood sugar levels increase. The utilization of blood sugar for metabolic purposes is mediated by insulin; a hormone produced by the pancreas and diabetes is due to the relative or complete deficiency of insulin.