Diabetes is a chronic disease; it is caused by the malfunctioning of the pancreas which does not or insufficiently produce a hormone ‘insulin’ necessary to convert sugar, starches and other food into energy needed for daily life. This causes the level of glucose in the blood to be too high for kidney filter function thus glucose gets collected in the urine.
Emotional Stress
Certain medicines
People with diabetes are at twice higher risk of premature death compared to healthy people of the same age.
In 2006, Diabetes was the sixth ranking leading cause of death in America.

Frequent and increased urination; may find that it attracts ants
Constant thirst, dry throat, drink a lot of water
Extreme fatigue
Excessive hunger, eat a lot but experience weight loss
Cuts and bruises that are slow to heal and itchy
Skin itches, fungus infection of the skin
Blurred vision
Tingling or numbness in the hands or feet, difficulty with erection, in men