Chest swelling and pain but no menstruation, there are usually the following reasons: First, the normal reaction before the onset of menstruation, there will be physical changes before the onset of menstruation, such as chest swelling and pain, abdominal pain, lumbago, grumpiness, in about 2-3 days into the phase of menstruation, with the normal onset of menstruation, chest swelling and pain will also disappear. Secondly, consider endocrine disorder, caused by abnormal secretion of estrogen and progesterone in women’s body. Under the stimulation of hormones in the body, breast cells produce edema and congestion, and there will be obvious swelling and pain. Thirdly, it is considered to be breast enlargement. If frequent breast swelling and pain does not occur during the pre-menstrual period or the time of menstruation, it means that the breast may have symptoms of disease, so we should pay attention to it and go to the hospital for examination in time.