A woman’s weight at the time of menstruation may change compared to her non-menstrual weight, with gains and losses ranging from 2-4 pounds. The main factors contributing to this weight change are: i. Weight gain may be caused by water and sodium retention due to changes in the levels of estrogen and progesterone, which affect the excretion of water and sodium from the body. ii. Some women may feel a significant sensation of bloating in the limbs, and may find depressed edema in the lower limbs when performing routine examinations. Weight gain due to this reason will return to normal after menstruation as the endocrine function tends to stabilize and the water and salt retained in the body are excreted. Second, some women during menstruation appetite is relatively strong, and like to eat high sugar, high oil diet, resulting in excessive calorie intake, coupled with insufficient physical activity during menstruation so that the calorie consumption is too small, it is also possible to make the weight increase, the increase is generally not large, in 1 pound or so, but over time will cause the phenomenon of obesity.