You Xuan grass is bitter, sweet and slightly cold. Herba Hedyotidis Diffusae has good effects of clearing away heat and toxic materials, promoting blood circulation to relieve pain, inhibiting bacteria and resisting tumor, and is mainly used for treating sore throat, tonsillitis, common cold and headache, tracheitis, chronic hepatitis, joint pain and snake bite. Whole grass can relieve esophageal cancer, breast cancer and rectal cancer. "