The first thing to do is to diagnose the extent and depth of the trauma, if it is just a superficial abrasion, you can use hydrogen peroxide and iodine volts to disinfect, and usually you can smear some growth factor ointment to prevent infection. If the wound is deeper or larger, it is recommended to go to the hospital for examination and let the doctor give a thorough debridement and disinfection, and later need to inject tetanus. If the wound is dirty, you may need to take oral anti-inflammatory drugs to prevent infection. Generally superficial abrasions will scab themselves in 10-14 days and can slowly heal.