Why must the ginger be fried?

Ginger foot must be fried dry before foot application, because the main purpose of ginger foot application is to remove the cold in the body, so be sure to fry ginger dry after application, application time is recommended within half an hour, because long-term application will make the skin feel pain and burn feeling. In addition, it is recommended that the replaced ginger should not be used again, directly thrown away, can not be used twice, or advised patients if there is a disease, must go to the hospital for treatment.