The decoction dosage of Mangosteen Leaf is usually 6-9g, but the exact dosage should be decided by the doctor according to the patient’s condition. Mangosteen Leaf has the effects of clearing heat and fire (removing heat and fire from the body), removing vexation, and inducing diuresis. The main treatment of fever and thirst, mouth sores and urine red, heat shower (burning stinging pain when urinating, with urinary frequency and urgency, small abdominal traction discomfort) astringent pain. Mangosteen leaves for fever injury, thirst, often with gypsum, rehmannia, etc.; treatment of heart, stomach fire, mouth and tongue sores and transfer of heat in the small intestine, hot shower astringent pain, can be matched with talcum, leucorrhiza, lampsbane and so on. Caution should be exercised if there is no solid fire or dampness-heat, and forbidden to be taken by those who are weak and have cold. If there is any discomfort, it is recommended to consult a doctor promptly. If medication is needed, it should be identified by a doctor and standardized treatment should be followed.