After the sprain can be plastered, but it is best to choose 24 hours after the sprain, if the plaster is too early, it will lead to further increase the local small blood vessel rupture bleeding. Because the sprain itself has blood vessel rupture, there is blood leakage, if early plastering, will lead to accelerated blood circulation, vascular expansion will increase small blood vessel bleeding, resulting in swelling and inflammatory edema further aggravated, is not conducive to healing. After 24 hours, the bleeding of small blood vessels in the sprain site has basically closed, at this time then paste can effectively increase blood circulation, promote the absorption of inflammatory metabolites, can effectively reduce swelling and edema, by increasing blood circulation, can effectively improve the blood supply to the injury site, nutritional support further increase to help healing.