During the first week after delivery, as the colostrum is changing to mature milk, your breasts will become full. This normal postpartum fullness usually diminishes within 3-5 days. Engorgement may develop if your baby does not adequately remove the milk from your breasts. During this time, your breasts will feel hard, painful and hot.
Breast Engorgement by Medela (165k pdf)
for Andover Pedi patients