It has also been argued that injecting anesthesia can be as painful as the circumcision itself. Lander's study was terminated after several infants circumcised without anesthesia experienced apparent life threatening breathing difficulties, including choking and apnea. The shock of circumcision without anesthesia and extremely vigorous crying can produce additional dangerous complications including heart injury, pneumothorax and gastric rupture. In order to remove it, the foreskin is pulled, torn, crushed and cut. We now know that babies actually feel pain more intensely than adults.
Most babies scream wildly.
Blood pressure and heart rate increases markedly. Some go into severe shock, and lapse into a semi-comatose state. This is often misunderstood by medical professionals who later insist that the baby experienced no pain because they laid there without moving or crying. Babies continue to feel pain after the surgery. Events that cause stress and pain appear to affect a baby's feeding patterns.