Which channel is responsible for spreading to the lower surface of the tongue?

The channel responsible for spreading to the lower surface of the tongue is the Spleen (SP) channel. In Traditional Chinese Medicine, the Spleen channel is associated with the digestive system and the transformation and transportation of food and fluids. One of its key roles is the nourishment of the tongue, which reflects the health of the Spleen.

The lower surface of the tongue is particularly relevant because it is an area that can show signs of Spleen deficiency, such as paleness or a pale tongue body, indicating a lack of nourishment or Qi (energy). This connection is essential for maintaining overall health, as the Spleen is thought to govern the production of blood and Qi, which in turn nourish the muscles and the tissues of the body, including the tongue.

Understanding the role of the Spleen channel highlights its importance in not just digestion but also in how it reflects overall health through the tongue's condition. This emphasizes the interconnectedness of the Spleen with other systems in the body, making it crucial in both diagnosis and treatment within Traditional Chinese Medicine.