Tongcao is cold in nature, sweet and light in taste, and has many functions: 1, Tongcao has a diuretic, seepage of dampness, Tongcao can facilitate urination, swelling, treatment of dampness-heat, can be used to treat edema and urinary symptoms. 2, Tongcao can be used for ventilation, breast milk, if the postnatal milk can not pass or milk is low can be used with Tongcao, has a very good role in promoting lactation, with Tongcao, licorice, pig’s hooves and stewed together to promote the milk. 3, Tongcao also has a heat, dampness effect, can be used to treat dampness-heat syndrome caused by headache, poor appetite, chest tightness, afternoon body heat and other symptoms. 4, Tongcao also has the role of the nose, if a cold can use Tongcao to The role of dampness, can be used for the treatment of dampness and heat caused by headache, poor appetite, chest tightness, afternoon body heat and other symptoms. 4, Tongcao also has the role of the nose, if you have a cold, you can use Tongcao to pass the nose, the effect is very good. But Tongzhao also has side effects, the dosage will be too large nausea, vomiting, stomach pain and other symptoms, long-term large quantities will cause cholesterol increase, so Yin deficiency, gas deficiency and many pregnant women are prohibited to take.