Diabetes Doctor in Dombivli Symptoms of Diabetes Some common symptoms for both type 1 and type 2 diabetes there are common symptoms. In type 1 diabetes, the onset is at an earlier age and is sudden. In type 2 diabetes, the onset is more gradual. The most common symptoms are as listed below: Polydipsia (increased thirst) Polyuria (increased urination, including possible bedwetting) Polyphagia (increased hunger) Rapid and unexplained hunger Weakness and fatigue abdominal pain, nausea and vomiting Irritability and itchy skin Unpleasant odor of breath Blurred vision