After the collision should be taken within 24 hours of the cold compress method of treatment, because after the collision injury within 24 hours of the injury will gradually bleed, through the cold compress can make vascular constriction, reduce bleeding, the absorption of blood bruises in the later stage has a great role in helping. If the collision after 48 hours, you can take the hot compress method of treatment, because once the collision injury, in 48 hours after the general will not bleed again, and has been oozing blood needs to be completely absorbed, in order to make the collision after the injury better. To absorb blood stasis must accelerate blood circulation, hot compresses can well accelerate blood circulation, the absorption of blood stasis has a helpful effect. In addition, after 48 hours after the collision can also be used externally to activate blood stasis drugs or oral blood stasis medicine, but also to accelerate the absorption of blood stasis of this effect.