Sorry about the difficulties in your baby's poo. This apparently painful pooping is technically called Infant Dyschezia. But eventually, the muscles are overtaken by the baby's effort. They relax, and the poop flows. To relieve the pain, Massage your baby's belly. Also note that If your baby becomes dehydrated, his system will respond by absorbing more fluid from whatever he eats or drinks – and also from the waste in his bowels. The result is hard, dry stools that are difficult to pass.