Weight gain before menstruation is due to water and sodium retention caused by increased estrogen levels. An overactive appetite occurs before menstruation, and eating large amounts of food causes weight gain, with some women gaining about three pounds. After the menstrual period, the hormone level decreases and the weight is gradually restored. If you plan to slim down can be carried out in the week after the menstrual period, when the metabolism is faster slimming effect than usual, diet combined with exercise to lose weight will not affect health. Worried about premenstrual weight gain can control the diet, when there is hunger can eat oatmeal can increase satiety, also does not contain too much fat, eat less greasy, fried food. The body will change before the period, is affected by the hormonal changes in the body, some women will also appear premenstrual syndrome, such as physical fatigue, abdominal pain, chest pain, irritability, insomnia, dreamy, etc., after the period symptoms will gradually disappear.