Porcupine spurge, also known as three needles, has the effect of clearing heat and drying dampness (removing heat and drying dampness), diarrhea and detoxification (removing fire and evil from the body). It is mainly used for the treatment of damp-heat diarrhea, jaundice, eczema, carbuncle sores, sore throat, eye redness and other symptoms. Porcupine prickles are bitter in flavor and cold in nature, with the efficacy of clearing heat and inducing dampness (removing heat and dampness from the body), diarrhea and detoxification. It is mainly used for treating dysentery, jaundice, sore throat, eye redness, and bruises. It is commonly used in Chinese medicine to treat damp-heat diarrhea, jaundice, eczema, sore throat, red eyes and ears, carbuncle and sores. The drug is often paired with other herbs to form formulas for the treatment and prevention of diseases. Porcupine spurge should be used with caution, as it is a bitter-cold herb and should not be taken by people with cold constitutions or frequent diarrhea or loose stools (thin, unformed feces). The use of Chinese herbs should be under the guidance of a professional physician’s diagnosis and rationally selected according to one’s own condition, and should not be taken on one’s own, so as to avoid delaying one’s condition.