Fish-eye grass has the effect of clearing away heat and detoxification (removing heat and toxicity from the body), eliminating carbuncle and pus, diuretic and detoxifying; it can be used for lung carbuncle and pus, phlegm-heat asthma and cough, hot diarrhea, hot shower, carbuncle, swollen and poisonous sores and other diseases. Fish-eye grass belongs to a kind of traditional Chinese medicine, is the fresh whole grass or dried above-ground part of Houttuynia cordata, family Sambucusaceae, pungent, slightly cold. It belongs to the lung meridian. It has the efficacy of clearing away heat and detoxification (removing heat and toxicity from the body), eliminating carbuncle and pus, diuretic and diuretic; it can be used for lung carbuncle and pus, phlegm-heat asthma and cough, hot diarrhea, hot shower, carbuncle, swelling, sores and poisons and other diseases. Adverse effects and contraindications of Fish Eye Herb are not clear at present. Drugs need to pay attention to, spleen and stomach cold (spleen and stomach weak cold) caution; allergies caution. If there is a need for medication, it should be used under the guidance of a Chinese doctor, and should not be used blindly on its own to avoid adverse consequences.