On the days of the White Dew, the temperature difference between day and night becomes larger.
The White Dew (Bai Lu, “白露” in Chinese) is the 15th term of the 24 traditional Chinese solar terms (a supplementary system in the Chinese calender to guide farm work) and falls on sometime around Sept. 8, when the sun moves to the celestial longitude of 165 degrees. On the days of the White Dew, the temperature difference between day and night becomes larger. In the morning, drops of dew appear on leaves and stems of plants, which are condensed from water vapor in the air during cold night.
Many people feel their throats become dry and skin tight when getting up in the morning during the days of the White Dew, and the thirst couldn’t be quenched even after drinking a large cup of water. This symptom is the so-called “autumn dryness”. On such days, to maintain normal water content in lungs and respiratory tract, people should drink plenty of water, especially honey water, weak tea, juice, soybean milk, milk, and so on, eat more fresh vegetables and fruits, eat less or do not eat spicy food, such as pepper, Chinese red pepper, cinnamon, ginger and onion, and do not drink alcohol, etc. And they should also appropriately adjust their living habits, trying to go to bed and getting up early.