There is a small amount of yellowish liquid overflow when squeezing the breast in the seventh month of pregnancy, called colostrum, whether it is normal is divided into two cases: 1, a small amount of milk: during pregnancy women’s lactogen levels will appear mildly elevated, while secreting a large amount of progesterone to stimulate the development of mammary gland follicles, resulting in breast enlargement, a small amount of milk, breast engorgement is obvious, pregnant women feel swollen breasts, as a normal physiological change during pregnancy; 2, a large amount of milk. Large amount of milk secretion and severe pain or lump in the breast may suggest pituitary microadenoma or breast lesion. Pregnant women are advised to wear loose, breathable, cotton underwear to avoid stimulating the nipples, and to pay attention to washing and keeping them clean and dry to avoid infection.