Regular vacation is also known as menstruation. Weight gain after menstruation is related to sodium retention in the body or daily diet. Weight gain caused by sodium retention will return to normal after menstruation and does not need to be treated; if it is caused by excessive diet, diet can be controlled. 1. Sodium retention: Weight gain after menstruation is generally a normal physiological phenomenon. During menstruation, due to significant changes in hormone levels in the body, it may lead to sodium retention in the body, which may result in excessive storage of water in the body and weight gain. Generally, there is no need for human intervention, and the weight will be restored after menstruation. 2. Daily diet: During menstruation, due to faster metabolism, women may have an increased appetite and eat a lot of high-fat, high-calorie foods, which may lead to significant weight gain during menstruation. If it is caused by excessive dietary nutrients, it can be relieved by diet control and proper exercise. It is recommended to avoid over-eating during menstruation, pay attention to cold protection and warmth to avoid catching cold, regulate mood, regular sleep, moderate exercise, and change sanitary napkins and underwear diligently.