During menstruation, breast swelling is related to the following factors: first, it may be due to hormonal changes in the body during menstruation, resulting in endocrine disorders, resulting in breast swelling and other problems, which are normal body changes, not only will there be breast swelling and pain, but also may appear various symptoms such as dysmenorrhea; second, it may be a problem caused by breast inflammation or breast enlargement, when these diseases appear will constantly stimulate themselves Thirdly, it may be caused by various factors such as excessive mood swings, mental tension or long-term late nights, so women must pay attention to their mood during menstruation, it is best not to be overly fatigued, and properly relax their psychological pressure, which can ease the symptoms of breast swelling.