Hi.
Lets make world Diabetic free.Some symptoms are given below.If you have these symptoms please run to the doctor.
Millions of people have diabetes and don't even know it because the symptoms develop so gradually, people often don't recognize them. Some people, particularly pre-diabetics, have no symptoms at all. Diabetics may have SOME or NONE of the following symptoms:

* Frequent urination
* Excessive thirst
* Extreme hunger
* Unexplained weight loss
* Sudden vision changes
* Tingling or numbness in hands or feet
* Poor circulation
* Poor sleep
* Feeling very tired much of the time
* Irritability
* Very dry skin
* Sores that are slow to heal
* More infections than usual

Hi
The test is simple, Glicemia: level of blood sugar if it is high it is called Hiperglicemia, low: Hipoglicemia. There are differences in the normal levels of glicemia depending if you ate recently or not. So the first test is glicemia after an overnight fast. If that is normal, that's it. if not then there are other test like challenged glicemia, which means you get a drink of sugar syrup and they check your levels after the intake. For the symptoms there's a lot and they are different for people but some: dizziness, constant thirst, frequent urination, weight loss.