Main symptoms include excess thirst, hunger and incresaed frequency of urination. Other symptoms can include blurry vision, numbness. Diabetes is a disease that affects how the body uses glucose a sugar that is the body's main source of fuel. The levels up to 100 are considered normal, and levels between 100 and 126 are considered pre-diabetes. Visit your doctor at this stage and ask for treatment. Diabetes though incurable disease but it isn’t untreatable, if properly controlled and monitored the outcome is really good, otherwise it can lead to some serious consequences and even death.