What are causes, symptoms, signs and treatment for diabetes?

Exact cause is unknown but most appreciated hypothesis is either low insulin or insulin resistance due to genetic +/- environmental factors. Symptoms and signs include increased thirst, extreme hunger, unexplained weight loss, frequent urination, fatigue, irritability, blurred vision, slow healing wounds, presence of ketones in urine, fruity odour and frequent infections.Treatment is either tablets or insulin to control blood sugar levels along with life style modifications (Diet + exercise).