You can’t drink pu-erh tea during menstruation, which contains more tannic acid, which will combine with iron molecules in food to form a large amount of precipitates, hindering the absorption of iron by the intestinal mucosa. In addition, the higher the concentration of pu-erh tea drunk during menstruation, the greater the obstruction to the absorption of iron. And women lose blood during menstruation. Drinking pu-erh tea during menstruation affects the absorption of iron and can easily cause iron deficiency anemia, so it is not suitable to drink pu-erh tea during menstruation. You can drink brown sugar water during menstruation, its can play a role in tonifying qi and blood, also can play a role in invigorating blood and relieving menstrual pain. You can eat black fungus, pig liver, etc. can be supplemented with iron, which can avoid iron deficiency anemia caused by blood loss during menstruation. During menstruation, you should enhance nutrition and eat foods rich in protein, such as lean meat, eggs, milk, etc. Keep a happy mood and avoid staying up late.