The bruise turned yellow can also continue to hot compress, because continue to hot compress, can promote iron-containing heme fade faster, so that the skin back to normal color. Because bruising means that there is bleeding under the skin, no matter which cause red blood cells from the blood vessels to infiltrate into the blood vessels, there will be skin bruising, because after the skin bruising, the iron inside will form iron-containing hemoglobin, iron-containing hemoglobin makes the bruise gradually become yellow, after the yellowing give local hot compress, it will make the local temperature increase, blood flow is rich, promote the skin yellowing fade. So after the bruise becomes yellow you can continue to apply hot compresses, the purpose is to promote the yellowing of the skin as soon as possible to restore the normal color. So bruises become yellow, or can continue to hot compress, so as to increase the local blood circulation, promote the skin to restore the normal color.