Reed is a kind of plant that grows by water or wetland in summer and belongs to Gramineae. Its flowers are usually composed of many small flowers, which are conical or long and purple or pink in color. This flower smells fragrant and has the effects of clearing away heat and toxic materials, cooling blood and stopping bleeding. Often used to treat nosebleeds, cough, pneumonia and other symptoms.

It is worth noting that reed is only a folk herb, and its efficacy and usage have not been fully verified by modern medicine. If there are related symptoms, it is recommended to consult a doctor.