Breast swelling pain including lumbar pain before menstruation, and not yet menstruation, in the middle and late menstruation belongs to the luteal secretion period, progesterone may be more vigorous and developed, will stimulate the vasodilatation of the breasts, resulting in localized mammary glands to appear oedema occurs, which may be pins and needles kind of pain, and may even have a bloating pain occurs. At the same time, the pelvic blood vessels are dilated before the onset of menstruation, which will stimulate the lower back to cause discomfort, and some people may even experience mild abdominal pain. This is just a sign that menstruation may be imminent, and it is recommended that you observe the situation for another 5-7 days, after which your period will usually return to normal. Spicy and stimulating foods, including cold and raw foods, should be eaten as little as possible, so as not to cause severe abdominal pain during menstruation.