Whether women will gain weight during menstruation depends on the diet during menstruation.1. Under normal circumstances, if women eat regularly during menstruation and don’t overeat, they won’t gain weight, but during menstruation, due to changes in the secretion level of estrogen and progesterone in the body, it will lead to the phenomenon of water and sodium retention, which will temporarily lead to weight gain, but after menstruation, weight will return to normal, a normal physiological phenomenon, not a real sense of weight gain.2. This is a normal physiological phenomenon, and not a real sense of weight gain. 2, if a woman during menstruation overeating, eating foods containing fat or sugar content is relatively high, there may be a phenomenon of weight gain. Therefore, women must pay attention to diet during menstruation, diet should pay attention to light, in order to prevent the phenomenon of gaining weight during menstruation.