If used correctly under the guidance of a physician, grass jelly is usually not obviously harmful to the human body, but because of its medicinal properties of pungent, warm and dry, if used in large quantities over a long period of time, there is a possibility that it may injure the fluids, and people who take it for deficiency of yin and blood may aggravate their condition. Cao Guo is pungent and warm in nature, belonging to the spleen and stomach meridian, it can remove phlegm and intercept malaria (remove phlegm, treat malaria), dry dampness and warm the middle. It can be used for cold pain in the epigastrium (feeling cold pain in the stomach and abdomen) caused by cold-dampness obstruction, vomiting and diarrhea, and cloudy and greasy tongue coating. In general, this medicine does not bring obvious harm to the human body if used correctly. However, its medicinal properties are pungent, warm, dry and strong, so it should be used with caution by people with yin deficiency and blood dryness, and may aggravate the condition if used blindly. In clinical practice, Caogang is often paired with Chinese medicines such as Hanxia, Chenpi, Cinnamon and Ginger to treat regurgitation, vomiting and fullness in the chest and epigastrium caused by cold-dampness internal obstruction of the middle jiao. It can also be combined with Scutellaria, Tongcao, Semixia, and Coix Seed to treat fever and inappetence caused by the initial onset of dampness-warmth (warmth caused by feeling dampness-heat). In order to avoid injury to the body, do not use Herba Cao Guo blindly, if you need to use the medicine, you must go through a doctor’s guidance.