1, Tongcao is the stem and pith of Tongdemu, a plant of the family Wujiaceae, belonging to the lung and stomach meridian, clearing away dampness and inducing diuresis; breast milk, used for gonorrhea and astringent pain; dysuria; edema; jaundice; dampness and temperature disease; short and red urination; postpartum breast milk; menstruation closure; and diarrhea.

2. Clearing dampness and inducing diuresis; promoting lactation. Main gonorrhea astringent pain; urinary incontinence; edema; jaundice; dampness and temperature disease; urinary shortness and redness; postpartum lactation; menstrual closure; and subluxation. It is used for dampness and warmth urinary redness, astringent pain of gonorrhea, edema, low urine, and lactation.