Yam is a mild and nourishing food with sweet taste and flat nature. It is the treasure of the whole body and has the effect of strengthening the spleen and nourishing the stomach. Yam's unique mucin can moisten the gastric mucosa, play a role in protecting the stomach, and also play a certain role in treating stomach pain. People with spleen and stomach deficiency and cold often drink yam porridge, which can effectively relieve stomach discomfort.