After meniscus injury, cold or hot compresses should be applied according to different timing. Within 24 hours after meniscal injury belongs to the acute phase of the injury, its pathological changes are mainly local vascular bleeding and tissue congestion, swelling, inflammatory reaction, take cold compress can effectively reduce bleeding, reduce local swelling, relieve pain, in the acute period of meniscal injury of 24 hours, must be intermittent cold compress effect is better. When the meniscus injury after 48 hours, the local bleeding will stop, local hematoma, tissue edema, you can take hot compress for the corresponding blood circulation treatment, promote the local hematoma absorption, mechanization and reduce the local swelling. After meniscus injury, according to the different timing, choose cold or hot compress treatment.