1, cogongrass rhizome can cool blood and stop bleeding. For ecchymosis and ecchymosis caused by fever, cogongrass rhizome can be decocted together with other drugs for clearing heat and cooling blood, such as Radix Rehmanniae and Cortex Moutan.

2, there is another role, Maogen can treat blood cough, long-term cough, for a long time, ordinary drug treatment is slow. On the dialectical basis, adding cogongrass rhizome and angelica can cure cough more quickly.