After muscle strain can be hot compress, but to choose the right time, in the acute period after the strain is 24-48 hours is prohibited hot compress. Acute period due to local injury there is local capillary rupture, bleeding, if the hot compress will promote capillary bleeding, aggravating local bruising, swelling, need to promote capillary contraction through intermittent ice or cold compress to reduce bleeding. After 24-48 hours, the local bleeding has basically stopped, and the local hot compress will promote blood circulation and facilitate the dissipation of bruising. If the hot compress is combined with the local application of blood-stasis activating drugs, the effect is relatively stronger. If necessary, you can take swelling and pain relieving drugs as well as blood relaxing drugs to reduce local symptoms and promote muscle repair.