Did you know that the right place to prick diabetic patients fingers is on the sides? (Areas marked with dots, not with an x) - Prick the finger with the lancing device at the sides of the finger as there are less nerve ending here than at the tips or the âpadsâ. World Health Organisation recommends the middle or ring fingers to be used for blood glucose tests (second and third fingers). Try to avoid using the little finger due to the skin being thin.