Huanglian and cinnamon can both be used as Chinese herbs, there is no strict limitation on the way they can be brewed together, so there is no such thing as the correct way to brew and drink water. Huanglian’s function is to clear heat and dry dampness, diarrhea and detoxification, for damp-heat plumpness (stomach distension and discomfort), vomiting, diarrhea, high fever and dizziness, heart fire hyperactivity, heartburn and insomnia (heartburn and insomnia), palpitations, etc. It has a therapeutic effect. Excessive long service is easy to hurt the spleen and stomach, the spleen and stomach cold people should not use. Bitter and dry, easy to hurt the yin and fluids, yin deficiency and fluids are not used with caution. Cinnamon’s effects are to tonify fire and help yang, disperse cold and relieve pain, warm the meridians, draw fire back to the source (inhibit the fire of the kidneys from rising), can be used to treat kidney yang deficiency, fire failure of the life gate (weakness of kidney yang in the body, the function of warming and promoting the operation of qi and blood is reduced), cold pain in the heart and abdomen, and so on. Caution should be exercised for those who are suffering from yin deficiency and fire exuberance, those with bleeding tendency and pregnant women. It should not be used with red stone resin. Huanglian and cinnamon have the above effects, clinically used in the decoction of the formula to take, the effect of drinking water is limited, so it can not replace the therapeutic role of drugs, if necessary, should be taken under the guidance of a doctor.