How long it takes for milk spillage to go away varies from person to person, and usually disappears within 6 months after delivery as milk production decreases. Breastfeeding is often caused by excessive milk production and failure to breastfeed in a timely manner. When a woman starts to give milk, her breasts will usually produce more milk, and after the baby suckles, the body will regulate the amount of milk given according to the amount the baby suckles each time. Excessive milk, too many times of breastfeeding and no timely emptying of the breasts, it is easy to cause the breast to gather too much milk, frequent sucking will also stimulate the breast has been milk, resulting in overflow, the baby cry to stimulate the hypothalamus of the female can also be reflexively caused by overflow. It should be noted that, during the period of milk overflow should avoid too much milking, otherwise it is easy to stimulate the breast to secrete more milk. In addition, if pathological milk overflow occurs, that is, milk overflows from one or both breasts, the milk is thin and the amount of milk is not enough to meet the demand, and there is usually pain in the breast on the overflow side, then you need to consult a doctor in time to confirm whether it is caused by inflammation of the milk ducts, breast tumors, or high lactogen, and then actively carry out the treatment after the confirmation of the diagnosis.