Tongcao under the milk generally eat a few times is not clearly defined, need to be based on personal constitution and other factors to decide, under the guidance of traditional Chinese medicine, should follow the doctor’s prescription for medication. Tongcao is the dried stems and pith of Tongtuomu (Tongtuomu), a plant of the family Wugazhidae, which is diuretic and diaphoretic (improves the problem of incomplete urination and small amount of urination), and is also effective in promoting qi and lactation (smooths out the flow of qi in the human body and promotes the secretion of breastmilk). It is used for treating gonorrhea (increased frequency of urination, astringent and painful urination), edema, postpartum lactation, and blindness. The adverse effects and contraindications of this product are not clear. It can be used with licorice and pig’s trotters to treat postpartum lactation, and should not be used with malt. Tongcao is used for breastfeeding generally take a few times Pharmacopoeia does not specify, and individual constitution, the use of the drug after the situation of breastfeeding, the degree of tolerance of the drug and other factors related to the existence of individual differences. The use of Tongzhi in the treatment of diseases should be guided by a doctor.