Tongcao has the efficacy and effects of moistening the lung, lowering breast milk, diuretic and laxative. In clinical application, it has good therapeutic effects on gonorrhea, urinary disorders, edema, dysuria, jaundice, reduced lactation after delivery, amenorrhea and dysbiosis. In addition, it has significant anti-inflammatory, antipyretic and antioxidant effects. When inflammatory infections occur, Tong Cao can be used with related herbs and will receive good results. In addition, avoid applying Tong Cao or use it with caution when there are the following conditions, such as deficiency, pregnancy, and cold and damp body condition.