Diabetic Ketoacidosis Symptoms. Part of the series: Medical Symptoms, Causes & Treatments. Symptoms of diabetic ketoacidosis are increased thirst, increased urination, weakness in the legs, vomiting, increased appetite, confusion, abdominal pain, shortness of breath and a general feeling of illness. Look for fruit breath when looking at the symptoms of diabetic ketoacidosis with insight from a nurse and respiratory care practitioner in this free video on diabetic ketoacidosis symptoms. Read more: