Numbness and tingling could be a symptom of many problems. If you have weight loss, your drinking a lot of water and still thirsty and signs of what feels like a bladder or urinary track infections, these can be signs. See you doctor for a A1c test. This blood test show your average blood sugar levels over the last three months. Wait to worry until your tested.
That's hard to say. Go here to the American Diabetes web site to see if you are a diabetic http://www.diabetes.org/home.jsp.