Drinking coffee during menstruation can cause insomnia, fatigue, and increased menstrual blood flow. Because coffee is an excitatory drink, women who take it may lead to increased menstrual blood flow, prolonged periods, blood clots, etc. Women who drink coffee will stimulate the nervous system to insomnia, which makes women prone to fatigue and weakness, which is not conducive to physical health. Women should pay attention to proper rest during menstruation, eat more hot, easily digestible, blood-supplementing food, and also eat appropriate vegetables and fruits, which is conducive to maintaining a comprehensive and balanced nutrition. This will help women to get enough protein, vitamins and trace elements during menstruation to replenish the loss of nutrients due to the outflow of menstrual blood, and also to keep warm to avoid getting cold and flu, so as to facilitate the recovery of the body.