Fossil Grass, also known as Kidney Tea and Cat’s Whiskers, is used as an herbal medicine to clear heat and dampness, and to clear lymph and diuresis. Fossil Grass is the dried above-ground part of Kidney Tea of Labiatae, with sweet, light, slightly bitter flavor and cool nature. It is effective in clearing away heat and dampness, clearing lymph and inducing diuresis. In case of urinary urgency, urinary heat and urinary pain caused by dampness and heat in the bladder, it can be treated or improved by using Fossil Grass to reduce the discomfort. It is worth noting that, in order to avoid improper use of medication, to ensure the safety of medication, should follow the principle of identification of drugs, it is recommended that a professional Chinese medicine practitioner according to the patient’s specific symptoms to determine the specific use of medication, do not blindly use their own single or with Chinese herbal medicines.