After giving birth to a baby, breast secretion of milk may lead to acute mastitis and increased milk secretion if squeezed frequently. After giving birth, due to the sudden drop in progesterone levels, lactogen secretion increases, resulting in the phenomenon of breast swelling and secretion of milk. At this time, if you do not squeeze, 1 to 2 weeks after the secretion will stop, but if often squeezed, may reflexively stimulate the pituitary gland prolactin secretion, resulting in a further increase in milk secretion. At the same time, frequent squeezing may also lead to bacterial infection of the breasts, resulting in acute mastitis, which is usually accompanied by redness, swelling, heat and pain of the breasts, high fever and other symptoms. Therefore, it is recommended that women should not squeeze their breasts too often after childbirth, and if any abnormal symptoms occur, they should seek medical treatment in time to improve the relevant examinations and standardize the treatment.