Generally speaking, it takes about 3 days to relieve breast swelling and pain, during which the baby should be strictly prohibited from sucking or breast massage to avoid excessive milk production, and take milk returning medicine and vitamin B6 under the guidance of a specialist. a week later, milk can be gradually reduced and swelling and pain can disappear completely, if redness and swelling of the breast occur during this process and the pain increases, you should be alert to the possibility of acute mastitis and empty the milk as soon as possible. The breast should be emptied as soon as possible and intravenous penicillin or cephalosporin antibiotics should be administered in a timely manner to combat the infection. If medication does not work and there is a fluctuating lump in the breast, you should go to a regular hospital for breast surgery or general surgery in time. During the period of breastfeeding, you should eat light, vitamin-rich food and avoid high-fat, spicy and stimulating food.