Weight loss does not necessarily occur during menstruation, so there is no such thing as a complete weight regain in the first few days after menstruation. The weight of the human body is influenced by many factors and is not constant, for example, the amount of food and water intake, the amount of bowel movements and the amount of urination. When a woman enters her menstrual period, she may experience a temporary weight loss due to a certain degree of vaginal bleeding and discomfort, which is not quantifiable. In normal times, as long as you can eat healthily, there will be no impact on your health, especially for women during menstruation, do not eat spicy and stimulating food, do not exercise strenuously, establish a healthy lifestyle, and adjust your living condition, there will be no significant changes in weight during menstruation.