Acute mastitis can occur a few weeks after childbirth, usually within the first two to three weeks, although it can also appear later during the breastfeeding period. The key issue is to maintain the flow of breast milk and the patency of the milk ducts during breastfeeding. It is recommended to wash both nipples before breastfeeding, let the baby completely empty one breast first, then move on to the second breast. If the baby is full and doesn't finish the milk from the other breast, it's best to empty that breast either by using a breast pump or having the father extract the milk. For the next feeding, start with the other breast, which was the second breast previously used, and alternate accordingly. Additionally, nipple care is important; after the baby has finished feeding, express a little milk and apply it on the nipple surface. Before the next feeding, wash the nipple with clean water more diligently. This can help reduce the occurrence of acute mastitis.