Chest swelling and discomfort is a relatively common symptom in women, generally consider several situations: 1, cystic hyperplasia of the breast, referred to as mastopathy in middle-aged women is due to benign hyperplasia of the breast parenchyma appears swelling and discomfort, mainly manifested as swelling and pain before the menstrual cycle increased, after the onset of menstruation to reduce or disappear. The main cause is the disorder of female hormone metabolism, the imbalance of estrogen and progesterone ratio, which makes the breast parenchyma overgrowth and incomplete replenishment, generally through symptomatic treatment, the use of liver and qi dredging, harmonization of punch and the regulation of ovarian function of Chinese herbs, Chinese patent medicine regulation. 2, early pregnancy reaction, if there is no measures of sexual life, can also appear during early pregnancy breast swelling and pain discomfort, this situation is also due to the body hormone level changes. 3, breast tumor, when the tumor is significantly larger, can also appear chest swelling discomfort. In either case, it is recommended to go to the hospital as much as possible.