Breastfeeding a breast a breast small, by encouraging the baby to eat more milk less side, adjust the sleeping posture, appropriate massage smaller side and other methods to adjust. 1. Encourage the baby to eat more milk less side: for breastfeeding milk eating bias lead to a chest big a chest small time, you can change the breastfeeding habits in breastfeeding, so that the baby first ate milk less side, can increase the stimulation, promote milk secretion, and to a certain extent, can correct the situation of the chest small. 2. Adjust the sleeping position: sleeping for a long time on the side with small breasts will easily lead to breast pressure and affect the blood circulation of the breasts. Therefore, you can lie down flat or sleep alternately on the left and right sides. 3. Appropriate massage of the smaller side of the breast: usually under the guidance of a professional physician, appropriate massage of the smaller side of the breast can promote milk secretion and blood circulation in the breasts and can make the smaller breasts increase in size. During the breastfeeding period, when one breast is big and the other is small, you can go to the hospital to consult the doctor and correct it under the doctor’s guidance.