Breast pumps generally do not cause regained milk, it is recommended that the use of breast pumps should not be too much negative pressure, should not be too long time to suck milk. Breast pumps mainly use the principle of negative pressure to make the breast milk is sucked out, which can avoid the accumulation of milk in the breast, and breastfeeding women with breast pumps will continue to breast milk secretion after sucking the breast milk, usually does not lead to return to the milk, on the contrary, may make the milk secretion increase. It is recommended that breastfeeding women use breast pumps at the right frequency and avoid using too high a frequency to prevent breast pain. In addition, the use of breast pumps should not be too long, to prevent prolonged use of breast pumps to suck milk, resulting in damage to the milk ducts. Although the breast pump will not lead to milk return, but usually need to master the correct way to use the breast pump, to avoid improper use of the breast pump caused by breast damage.