Pearl grass is usually not toxic. Pearl grass is cool, sweet and bitter in nature, entering the liver and lung meridians, with the effect of calming the liver and clearing heat, brightening the eyes, diuretic and detoxification. In the clinic, pearl grass is mainly used to treat jaundice with dampness-heat, gonorrhea (increased frequency of urination, dribbling and astringent pain), dysentery, ulcers and poisons, and pediatric chancre (a kind of children’s chronic disease, which is characterized by emaciation, dietary anomalies, abdominal distension, and sparse and withered hair, etc.). In addition, because of its brightening effect, pearl grass can be used in adolescents or people who use their eyes more intensively, which is useful for relieving eye fatigue and protecting eyesight. Although Pearlwort is not toxic and has no obvious side effects, it is cold and bitter in nature, and should be used with caution by people with Yang deficiency and cold body. Drugs should be used by a Chinese medicine practitioner after dispensing, and should not be taken blindly.