The efficacy of cactus is to moisturize dryness and quench thirst, to promote blood circulation (to promote the operation of gas so that the blood flow), to clear heat and detoxification (to remove the body heat and poisonous evil); contraindication is that the cactus juice should not be in the eyes, otherwise there is a risk of blindness. Cactus is a common ornamental potted plants, but also a flavor of Chinese medicine, sweet, light, cool, to the lungs, stomach meridian, the whole plant can be used as medicine. It can be used to promote blood circulation, moisten dryness, quench thirst, clear heat and remove toxins, and is used for lung-heat cough, fever, mumps, carbuncle, sores and poisons, burns, thirst and other diseases. Cactus spines contain a small amount of toxins, the human body is prone to itching, redness, swelling and other symptoms after being pricked. If the sap of the cactus gets into the eyes, it may cause blindness. Since cactus is cold in nature, it should be eaten sparingly by people with weak spleen and stomach, and prohibited by people with weak spleen and stomach (spleen and stomach weakness and cold). Cactus itself contains a certain degree of toxicity, so should not be taken by themselves, need to be under the guidance of a physician to avoid adverse reactions to the rational use of medication.