Breast cysts are benign lesions and will not affect pregnancy, so don’t worry too much. Clinically, breast cysts are caused by endocrine disorders, such as reduced secretion of progesterone, increased estrogen or milk stasis. The harm of breast cysts mainly leads to breast swelling and pain, which affects women’s life and work, and does not affect women’s pregnancy. Clinically, most breast cysts do not require surgery, but mainly follow up and observation. In normal life, attention should be paid to prohibit the abuse of estrogen-containing foods and articles, such as birth control pills, and attention should be paid to the discharge of milk during breastfeeding to avoid the occurrence of acute mastitis and reduce the incidence of cumulative breast cysts.