If the arm is traumatized and the skin is broken, first of all, local disinfection treatment should be carried out. You can apply saline to wash the broken skin injury locally, then disinfect it with iodine volts, and finally apply some anti-inflammatory ointment. For the rupture is relatively large can also be local trimming, a phase of suturing to accelerate the healing of the wound. If it is caused by iron or some sharp injuries, it is best to prevent infection while also carrying out tetanus injection, to prevent tetanus bacillus infection caused by some serious complications. Therefore, the best treatment is to go to the emergency department to carry out some corresponding debridement and treatment, and after the operation, according to the severity of the disease, the appropriate application of some antibiotics to prevent infection.