As a traditional Chinese herbal medicine, many people only know about its nature, they know that Tongcao has the function of ventilating and lowering breast milk, it is one of the medicines for regulating the symptoms of poor breast milk and low breast milk after childbirth, and some regions will use Tongcao to boil soup with pig’s feet and carp. However, not all postpartum women are suitable to take Tongcao, which is a sweet and cold product, and should be taken with caution by those who have deficiency of qi and yin and no internal dampness and heat. And Tongcao has diuretic effect, after giving birth, it is easy to increase the burden of the maternal kidneys, which is not conducive to kidney and cardiovascular health and postpartum recovery. Therefore, it is risky to consume Tongcao at will, and it is necessary to follow the advice of clinicians whether to use it or not. Modern pharmacological research shows that Tongcao can significantly increase the amount of urinary potassium excretion, and has a diuretic and laxative effect. The polysaccharides contained in Tongkat herb have immune regulating and antioxidant effects, and can promote fat metabolism in liver and other tissues, which has the function of lowering blood lipids. Lactose contained in Tongkat herb can maintain the proper intestinal flora count in the intestine and promote calcium absorption. In addition, Tongcao has anti-inflammatory and antipyretic effects, and can treat acute cystitis and urethritis. As a traditional Chinese herb, Tongcao has a complex composition and is widely used. However, due to the diverse pharmacological and toxicological effects and the lack of a good system for identifying the authenticity of Tongcao, it is recommended to buy and use it under the guidance of a doctor.