Weight may become heavier during menstruation. Some women gain weight during menstruation due to changes in the levels of estrogen and progesterone in the body, which slows down metabolism and leads to edema due to water and sodium retention. A general increase of up to 2 kilograms is normal, and as hormone levels drop, weight can be restored after the physiological period passes. There are also larger hormone levels before and after menstruation, which may lead to mood swings and increased appetite in some people, eating more sweets and meat. And the basal metabolic rate during physiological period is lower than usual, if the activity level drops at this time, but the intake of energy is increased, there will be a possibility of weight gain. To summarize, weight gain may occur during physiological period, but if you experience discomfort during this period, you should consult a doctor in time.