Also known as Litchi grass, its effects mainly include clearing heat and removing toxins, cooling the blood, dispersing blood stasis, and inducing diuresis to reduce swelling. Lai Chi Cao is a Chinese herbal medicine made from the whole herb of Lai Chi Cao, family Labiatae. It is bitter, pungent and cool in nature, and belongs to the lung and stomach meridians. It mainly has the effects of clearing away heat and detoxifying the toxin (removing heat and toxicity in the body), cooling the blood and dispersing blood stasis, and inducing diuresis and eliminating oedema (clearing urine to eliminate water retention and oedema). This herb is mainly used in the treatment of cold and fever, lung-heat cough, sore throat, vomiting blood, coughing blood, urinating blood, leakage (excessive menstrual flow or dripping), bleeding hemorrhoids, dysentery, carbuncle, swollen sores and poison, eczema itching, bruises, snake and insect bites. Contraindications and adverse reactions are not clear. Specific medications related to Lycopodium should be administered under the guidance of a physician specialist and should not be used without authorization.