Most of the time, a skinned knee is a relatively minor problem, treatable at home—but inspect your wound just to be sure. A wound is considered minor and treatable without medical attention if:  It is not deep enough to see fat, muscle, or bone. It is not spurting blood. Its edges are not jagged and far apart. If you do notice any of these conditions, contact a doctor. If you haven't had a tetanus shot in ten years, see a doctor and get a booster. If you haven't had a tetanus shot in five years and the wound was caused by something dirty or is a puncture wound (a wound that's deeper than it's wide), see a doctor and get a tetanus booster. You do not want to cause an infection when treating your skinned knee, so wash your hands thoroughly with soap and warm water before starting to take care of it. If you want extra protection, you can also put on disposable gloves before starting to clean the skinned knee. If there is any bleeding on your skinned knee, stop it by applying pressure on the site.  If dirt or debris is blocking the spot where the knee is bleeding, rinse it off before trying to stop the bleeding. Otherwise, rinse and wash the wound area after stopping the bleeding. To stop the bleeding, hold a clean cloth or gauze over the bleeding portion of the wound, and apply pressure for a few minutes. Change the cloth or gauze if it becomes soaked with blood. If the bleeding does not stop after 10 minutes, contact a doctor, as stitches may be required.

How would you rephrase that briefly using Vietnamese?
Kiểm tra vết thương. Rửa tay trước khi xử lý vết thương. Cầm máu nếu cần.