While the nerve endings of all newborns are underdeveloped, they do feel some discomfort during the circumcision. I use an initial bandage infused with a numbing agent, so your baby will experience nearly immediate relief without requiring any painful injections. Typically, infants are calm within a minute of the completion of the procedure.
I also suggest giving your baby sugar water immediately before and after the circumcision as a natural form of pain reduction. To make sugar water for babies, you can mix one teaspoon of white sugar with two teaspoons (10 ml) of boiled or distilled water. To learn more about the use of sugar water to reduce pain in infants, see https://youtu.be/vFjA0thnDgc?feature=shared.