It is not recommended to drink black tea during menstruation because the theophylline contained in black tea will stimulate the nerves and make it easy for mental tension to occur, which can aggravate premenstrual tension syndrome. Theophylline in black tea usually also affects the absorption of iron, and during menstruation there will be a large amount of iron loss, so drinking black tea will aggravate the symptoms of anemia. During menstruation, you should not consume cold and spicy foods, because the body’s resistance drops during menstruation, which can easily cause the gastrointestinal tract to function poorly. If you apply these stimulating foods, it will easily affect the gastrointestinal tract. During menstruation, because the cervix is wide open, you should also pay attention to vulvar cleaning, and you should avoid having intercourse during menstruation to avoid causing endometrial inflammation. Also pay attention to the vulva clean, wash the vulva with warm boiled water every night, you can also apply brown sugar ginger water to ease the discomfort, promote menstrual blood discharge in time.