Circumcision of a newborn is mostly a quick, safe procedure when done by a skilled doctor. To lessen pain for newborns, a pain killer may be used. There is some evidence that babies may be less likely to feel pain 7 to 10 days after birth. This is because newborns have a high level of endorphins (substances made by the body that reduce pain).
A special clamp is attached to the penis and the foreskin is cut away.