The sea of water and grain refers to the stomach, the stomach is the body of food digestion and absorption of important organs, the main acceptance (acceptance of accommodation) putrefaction (preliminary digestion of food, the formation of food) water and grain, “the sea of water and grain”, “Taicang” said. Stomach is one of the six viscera, known as the “sea of water and grain”, the main physiological function is to accept and putrefaction of water and grain, physiological characteristics of the main through the descending, like to moist and evil dry. The body of the essence of blood and fluid production are dependent on the stomach of the food nutrients are also the absorption of the essence of the water and grains. Under the effect of gastric qi, the stomach accepts and accommodates, and temporarily stored in it, so the Yellow Emperor’s Classic of Internal Medicine calls the stomach “the sea of water and grain”. Stomach qi accepts water and grain, which is the basis of its main putrefaction as well as the basis of food digestion and absorption. Stomach gas acceptance is very important for the body’s vital activities, stomach gas acceptance of water and grain function can be reflected through the appetite, so the “sea of water and grain” refers to the six viscera in the stomach. If you have stomach discomfort, you need to go to the regular hospital as soon as possible, so as not to aggravate the discomfort.