Chest swelling during menstruation is mainly related to hormone level disorder, emotional influence, breast fibroids and other factors, which should be analyzed reasonably according to different situations. 1. Hormone level disorder: During menstruation, hormone level in women’s body will be disordered, and higher secretion of estrogen and progesterone can promote the proliferation of mammary ducts and the development of mammary follicles, which will make women’s breasts swollen and painful, and the symptom will be relieved after menstruation. 2. Emotional influence: If women are tired during menstruation, have big emotional fluctuations, excessive mental tension or stay up late for a long time, when the body does not get enough rest, it will affect the mammary glands, which will make the breasts bloated, so you should keep a good mood during menstruation, and relax your mood. 3. Breast fibroma: breast fibroma occurs in young women, generally associated with estrogen drug stimulation and elevated levels of estrogen in the body, which can lead to fibroids in the mammary tissue, in the women’s menstrual period will show the situation of chest distension, you can choose a hot towel for the local hot compresses, will be a clockwise massage of the breast to relieve, and the chronic inflammation of the mammary glands. At the same time, chronic inflammation of the mammary glands, malignant tumors of the mammary glands and other diseases will also be manifested in the menstrual period of chest swelling may. If the symptoms of breast swelling during menstruation are not relieved, it is recommended to go to the hospital for examination and actively cooperate with the treatment.