Firstly, after a cut on the back of your hand, you should immediately clean the wound of any foreign matter, such as vegetable chips, seeds, flowers and leaves, and so on, so as not to let these foreign matters become the culprit of wound inflammation. You can take some clean napkins, cloths, etc. nearby to wipe the wound and all foreign materials around it. Secondly, the local area should be simply disinfected. After the wound and the surrounding foreign objects are cleaned up, the local area of the wound should be simply disinfected. Although it is inevitable to feel discomfort and pain when treating yourself, this step is still necessary, and the wound can be rinsed with cold boiled water soaked in salt. Secondly, you should urgently apply pressure to stop bleeding, if the wound is deeper and bleeding more, you need to apply pressure to stop bleeding. Another, to check the wound, whether it affects the function, some hand wound location is deeper, may damage the tendon, so, timely check the finger extension and tightening has not been affected. Finally, you should go to the hospital immediately to see a professional physician.