Sterilize with iodine, iodophor, etc. After removing iodine with alcohol, apply sulfanilamide powder or penicillin.
However, it is necessary to pay attention to hematoma and not puncture bleeding to control secondary infection.
If there is a fracture, it can be fixed and bandaged with bark, and it should be loosened and checked every three days (be especially careful). Generally, you can recover after one week (the younger you are, the faster you recover).