What is type 2 diabetes?

Type 2 diabetes is a condition that affects your body’s metabolism of glucose (sugar). It is the most common form of diabetes, and is caused by resistance to insulin or the inability of the pancreas to produce enough insulin. There are many contributing factors to developing type 2 diabetes, such as being overweight, lack of physical activity and family history. Symptoms can include increased thirst and urination, increased appetite, loss of weight, fatigue, change in vision, frequent infection and patches of darkened skin. Type 2 diabetes occurs when a person has blood glucose (sugar) levels that are higher than normal, and their body does not use insulin properly. 

Source: http://www.mayoclinic.org/diseases-conditions/type-2-diabetes/symptoms-causes/dxc-20169861