During menstruation, it is not recommended to drink black coffee. Menstruation is a special period for women, with reduced immunity, anxiety, irritability, insomnia, weakness, etc. It is very vulnerable, whether it is black or white coffee, which contains caffeine that may cause symptoms such as increased heart rate, increased blood pressure, dizziness, etc. It may promote uterine contraction, which may aggravate menstrual pain symptoms and lead to increased menstrual blood or dripping menstrual blood. If coffee is consumed in excess, it may easily aggravate insomnia and anxiety during menstruation, leading to emotional instability, etc. It is not recommended to drink coffee during menstruation. If you drink coffee, you should also limit the amount of coffee, 150-200ml each time, pay attention not to drink on an empty stomach, do not drink before bedtime, so as not to affect sleep, it is recommended to eat a reasonable diet during menstruation, establish a healthy lifestyle, ensure sufficient sleep, do not eat cold and spicy stimulating food.