Frequently signs of diabetes can be very non-specific. The classic symptoms are increased appetite, excessive thirst, and frequent urination. It can also lead to decreased resistance to infection, especially urinary tract infections and yeast infections, as well as subtle yet progressive change in vision. People with a family history of diabetes or who are overweight are at an increased risk. Diabetic complications can lead to loss of eyesight, kidney function, or even limbs as well as contributing to strokes and heart disease, so if you think you may have diabetes, see your physician.