It is possible to gain weight before menstruation, mainly because of the change in secretion of estrogen, progesterone, progesterone and other hormones, which slow down the body’s metabolism and cause water and sodium retention, commonly known as edema, causing a slight increase in weight, which usually does not significantly affect weight, and this condition usually returns to normal about 3 days after the menstrual period. However, if the edema is severe or if the weight loss does not persist, it is necessary to go to the hospital for examination to exclude other causes of edema. Before the onset of the menstrual period, due to changes in the patient’s hormone level, resulting in mood changes such as depression or irritability, some patients may relieve their bad mood by overeating and eating a lot of sweets, resulting in short-term weight gain. This condition can be recovered after menstruation by moderate control of diet and exercise for weight loss. During menstruation, patients should pay attention to personal hygiene and cleanse the perineum with running water daily. In case of discomfort such as bloating, constipation, headache, back pain, and breast tenderness, patients should ensure adequate rest to facilitate recovery.