Fracture plaster can promote the growth of bone scab to a certain extent, but pay attention to the time window of using the plaster. Bone scab formation after fracture is a self-repairing process, which is generally released and secreted by osteoblasts at the fracture end, connecting the broken ends and restoring bone integrity. The main ingredient of the plaster is Chinese medicine that activates blood circulation and removes blood stasis. The plaster can improve blood circulation around the fracture broken end, reduce local edema, and to a certain extent can promote the growth of bone scab around the fracture broken end. When fracture patients use ointment, they need to pay attention to the time window. For fracture patients in the acute stage within one week, it is not recommended to use plasters, because the plasters may increase the local exudation and aggravate the pain symptoms of the affected limbs; after the edema period and the rehabilitation period, you can use plasters as appropriate to promote blood circulation and accelerate the edema to subside, but the time of each use is not recommended to be more than 24 hours.