Why is blood taken for analysis from the ring finger? The finger pads are accessible, have no hair, are rich in blood vessels, they are easy to disinfect, and if necessary, squeeze. The skin on the ring finger is thinner than on the thumb, index and middle finger, and has fewer nerve endings, including pain receptors. The little finger is closely connected to the wrist, so when an infection is introduced into the wound on the little finger, inflammation can spread to the bend of the hand.