It is best not to eat chocolate during menstruation because chocolate contains caffeine, which tends to cause nervous system excitement and affects sleep during menstruation. Some women are prone to irritability, poor sleep or insomnia during menstruation, and eating chocolate can easily aggravate the insomnia symptoms. Chocolate may also cause endocrine abnormalities, resulting in changes in menstrual flow, possibly prolonging menstruation and aggravating menstrual pain. In addition, the sugar content and calorie content of chocolate are relatively high, and women with abnormal blood glucose may have elevated blood glucose after eating it. Eating chocolate will have a certain sense of satiety, after eating during menstruation may reduce the normal amount of food, which is not conducive to health, so try not to eat chocolate during menstruation. Menstruation is a special physiological period for women, usually lasting about 3-5 days, it is recommended to pay attention to a reasonable diet.