2, the Spring Festival due to the air contains a lot of water vapor, so it will feel more humid and hot, at this time the dampness is heavier, drink red beans and barley water can help eliminate dampness and spleen. In summer, the weather is hot, and the body is more prone to edema, the body's moisture is serious, at this time to drink red bean barley water can relieve edema, enhance appetite. The time of day in addition to the evening, the other time can drink, and in the morning when the absorption of the stomach is better, so the morning drink is better, and can also be eaten as breakfast.