Symptoms of type 2 diabetes can be similar to type 1 symptoms and may include: Increased thirst and hunger Frequent urination Blurry vision Feeling very tired People with type 2 diabetes may also have problems with: Infections of the skin  gums  or bladder Scrapes or bruises healing slower than usual Tingling or numbness in the limbs What causes type 2 diabetes? The most common problem is a transfusion reaction