Intestinal contractility is weakened, transportation is slowed down, and food cannot be digested and decomposed normally in the intestine. The root cause is bile. The main reasons are excessive cold in the body, decreased gallbladder contraction function and decreased bile secretion. The fat in food can only be absorbed and utilized by the intestine after bile is degraded, which is simply bile. Take time to dig some bitter tea with roots in the countryside. Usually, the diet is light, eat less cold and greasy things, and don't stay up late at night.