Regular vacation refers to menstruation. You can drink coffee in small amounts during menstruation, but it is not recommended to drink too much coffee, as the caffeine contained in coffee can make people excited, make it difficult for them to fall asleep, and even lead to menstrual disorders and other conditions. Drinking a small amount of coffee during menstruation has the effect of refreshing the brain and improving the agility of the mind. When drinking a large amount of coffee, the caffeine in coffee will stimulate the nervous system, and women may suffer from insomnia and poor sleep after drinking it. The caffeine contained in coffee will promote uterine contractions, aggravate the symptoms of dysmenorrhea, and also lead to an increase in the flow of menstrual blood or even prolonged menstrual period and other menstrual disorders. Do not drink a lot of coffee during menstruation, eat less stimulating food, pay attention to rest, and get enough sleep. If you experience discomfort after drinking a large amount of coffee during menstruation, it is recommended that you go to the hospital in time for appropriate treatment.