Women should not drink watermelon juice during menstruation, especially not with watermelon juice placed in the refrigerator. Although watermelon juice tastes sweet and quenches thirst, women drinking watermelon juice during menstruation can easily cause dysmenorrhea, cause poor discharge of menstrual blood, and can even cause reduced menstruation. Because watermelon is a cold fruit, it is not suitable to eat too much watermelon and drink too much watermelon juice during menstruation. Women should not eat too cold fruits and foods during their menstrual period, but should eat nutritious foods, such as lean meat, chicken, fish or protein-rich foods, seasonal fruits and vegetables, as well as spicy and stimulating foods.