It is normal for a one-month-old baby to have variable frequencies of bowel movements. If your baby has not had a bowel movement for 2 days but is not in pain, has no fever, and is feeding well, there is usually no need to worry. You can try gently stimulating the anus with a finger or a non-sharp object like a thermometer to help with constipation. If the problem persists, a glycerin suppository could also be an option. As long as your baby is drinking well and seems content, there is usually no cause for concern.