Drinking water boiled with Mangosteen leaves to relieve symptoms as prescribed by your doctor is usually not harmful. Mangosteen leaves have the effect of clearing heat and fire (removing heat and fire from the body), removing vexation and quenching thirst, and diuretic and diaphoretic (improving the problem of incomplete urination and small amount of urine). Mangosteen, sweet and light in flavor, cold in nature. It belongs to the heart, stomach and small intestine meridians. It is used clinically for treating fever and thirst, short and red urine (small amount of urine with dark yellow color), astringent pain, and mouth and tongue sores. Clinically used in the treatment of fever, injury to fluid, thirst, often with gypsum, rehmannia, etc.; if the treatment of pregnant women, fever, irritable heat (irritability and sultriness) and thirst, more than scutellaria baicalensis, Zhimu, etc.; the treatment of heart fire blazing, mouth and tongue sores, as well as the transfer of heat to the small intestine, hot lymphatic dampness, pain and so on, often used in the dengxin cao, talcum officinale and so on. It is often used in conjunction with Lianxin Cao and Shixi. It is taken with caution by those without solid fire or dampness-heat, and is forbidden to be taken by those who are weak with cold. Note that the effect of a single Chinese medicine is weak, can be in the identification of traditional Chinese medicine under the guidance of other drugs used together to achieve the best therapeutic effect. If you need to take this medicine, you should be under the guidance of a doctor.