Dry weather in winter often leads to excessive internal heat, constipation and indigestion. There is a saying in traditional Chinese medicine that "drink salt water early and honey late", which is especially suitable for this season.

Traditional Chinese medicine believes that salt has the functions of clearing heat, cooling blood and detoxifying. According to Compendium of Materia Medica, salt can "harmonize viscera, eliminate lodging and make people strong". Therefore, drinking a cup of light salt water on an empty stomach after getting up in the morning is conducive to reducing fire and benefiting the kidney, keeping the stool unobstructed and improving the digestion and absorption function of the stomach.