The contraindication of leucaena leucocephala boiled water is that it is forbidden to be taken by people with cold spleen and stomach, and there is no such thing as six contraindications. The root has the effect of cooling blood and stopping bleeding, and should be used in accordance with medical advice. The root is not used in the spleen and stomach cold (abdominal pain like press like warm, vomiting, diarrhea, etc.), ulcer more than thirst (urine more than thirst). Therefore there are no six contraindications for boiling water with leucaena leucocephala root. Adverse effects of leucaena leucocephala are not clear. Bai Mao Gen is a kind of Chinese herbal medicine with sweet flavor and cold nature. It has the efficacy of clearing heat, diuretic, cooling blood and stopping bleeding. It is used in treating blood-heat vomiting, epistaxis (nosebleed), blood in urine, damp-heat jaundice, fever and thirst, feverish gonorrhea and astringent pain (burning and stinging pain is obvious when urinating, accompanied by frequent urination and urgency, and discomfort of pulling in the lower abdomen), and oedema and urinary incontinence. The medicines must be used under the guidance of a doctor to recognize the evidence.