Rehmannia glutinosa’s main effect is to clear heat and fire (to remove heat and fire from the body), and so on; that is, leucaena leucocephala’s main effect is to cool the blood and stop bleeding (to make the blood cool and moist to prevent bleeding), and to clear heat and diuretic. Internal heat is divided into real and imaginary, rehmannia and lemongrass root can clear the real heat, but it should be noted that the efficacy of Chinese medicine in water is limited than the decoction. 1. Rehmannia glutinosa is a purgative, sweet and cold in taste, and belongs to the lung and stomach meridians. It has the efficacy of clearing away heat and fire, generating fluids to quench thirst (to promote the production of fluids to alleviate thirst), removing vexation, stopping vomiting and inducing diuretic effects, and is mainly used in treating the vexation and thirst of heat illnesses, the cough and phlegm of lung fever, cough and spitting up pus and blood in lung carbuncle, vomiting and vomiting of gastric fever, and feverish drenching (burning and tingling during urination with urinary frequency and urgency, and discomfort of abdominal traction). The adverse reactions and contraindications of this product are not clear, attention to the spleen and stomach deficiency and cold (spleen and stomach weakness and cold) should be used with caution. 2. Radix Bupleurum Chinense is an antiemetic, sweet and cold in taste, belonging to the lung, stomach and bladder meridians, with the efficacy of cooling the blood, stopping bleeding, clearing heat and inducing diuresis, and is mainly used for treating various kinds of blood-heat bleeding such as vomiting blood, nosebleed, blood in the urine, etc.; heartburn and thirst caused by fever; jaundice caused by dampness-heat, oedema and urinary incontinence; and astringent and painful urine caused by hot lymphatic discharge. The adverse reaction of this product is not clear, deficiency and cold bleeding, urinating more than thirst is prohibited. Please consult a medical professional for specific use of the drug. The efficacy of taking water is limited, not a substitute for medication, if you are not feeling well, it is recommended that you consult a doctor in a timely manner and follow the doctor’s instructions for medication.