In summer, the yang is released, and the human body function should also keep up with the rhythm of the yang. Qi and blood activities tend to be outward, and human yang is also floating outward. Phlegm (sweat hole) is easy to open and sweat, so sweating in summer will lead to diarrhea. Ancient doctors believed that people would sweat because they ate Shui Gu. Shui Gu can nourish and help sweating, just like drinking hot water to sweat after taking medicine for a cold. Therefore, due to various reasons leading to poor sweating, you can drink hot drinks, and the warmth of hot drinks will help you sweat.