Poplar flower as a medicinal herb is known as white poplar flower, which has the effect of clearing heat and detoxification (removing heat and toxicity from the body), resolving dampness and stopping dysentery, and is used as a main treatment for bacterial dysentery, acute enteritis and other conditions. Poplar flower is the dried male inflorescence of Populus tremula, Canada poplar or plants of the same genus in the willow family. This medicine has not been recorded in the materia medica of the past generations, and as a folk medicine, it is not commonly used in clinical practice. Poplar flowers are bitter and cold in nature, and are mainly used in decoctions for internal use. It should be used with caution for people with cold spleen and stomach (spleen and stomach weakness and cold), and the adverse effects are not yet clear. Patients who feel unwell are advised to consult a doctor in time, and should not seek treatment on their own to avoid delaying their condition. Although poplar flowers have no obvious toxic side effects, but should not be used indiscriminately, if you need to use the drug, must be directed by a professional doctor.