It is best for women to eat warm foods on the first day of menstruation, such as millet porridge, ribs, chicken, vegetables and fruits, which are good for making menstrual flow smooth and reducing dysmenorrhea and gastrointestinal discomfort, and not to eat cold, spicy and stimulating foods. This is because cold food can easily lead to gastrointestinal discomfort and can also lead to menstrual pain and reduced menstrual flow due to poor circulation of menstrual blood and stagnant blood stasis as a result of cooling the pelvic cavity. Spicy and stimulating foods can also cause accelerated blood circulation in the pelvic area, which can lead to increased menstrual flow and prolonged periods. On the first day of menstruation, women should pay attention to rest, eat normally, combine work and rest, keep a relaxed mood and avoid getting cold and flu to facilitate the normal menstrual period.