#3 Excessive fatigue
Food is converted by the body into simple sugars, such as glucose, when a person eats. In order to convert the glucose in the blood for energy, cells must first absorb it using insulin. Diabetes results from either insufficient insulin production by the pancreas or inefficient insulin utilization by the organism. The consequence is a rise in blood glucose levels.
Fatigue can result from hypoglycemia (low blood sugar), especially in those who have it frequently and don’t receive enough notice that their blood sugar is lowering. Even after receiving medication for low blood sugar, a person may still feel worn out.