Diabetes mellitus is a condition in the body caused due to the decreased production of insulin in the body. This in turn gives way for many other complications such as the irregularities in the metabolic rate and an high level of blood glucose in the body. Symptoms Sustained feeling of hunger and thirst,quick exhaustion,slow healing wounds are some of the symptoms. Root causes Diabetes mellitus can be caused due to dietary factors such as the excessive intake of sugar and refined carbohydrates or an overloading of fats and proteins. Such an ailment may also be caused by the excessive worry or tension or may be hereditary in nature.