Arm trauma, the phenomenon of broken skin, the first thing to do is to carry out local disinfection treatment, you can apply saline local cleaning broken skin damage, and then through the iodine povidone disinfection, and finally apply some anti-inflammatory ointment. For the rupture of the mouth is relatively large can also be localized trimming, for a period of suture to accelerate the healing of the wound. If it is caused by iron or some sharp object injury, it is best to prevent infection and also carry out tetanus muscle injection, to prevent tetanus bacillus infection caused by some serious complications. Therefore, the best way to treat the phenomenon of broken skin of the upper extremity injury is to go to the emergency department for some appropriate debridement and treatment, and after the operation, according to the severity of the disease, appropriate application of some antibiotics to prevent infection.