If the toenail is smashed and appears purple-black, it is considered that the local bruising is caused by traumatic factors, and the corresponding treatment plan should be determined according to the specific severity. If the bruised nail is not peeling off, it can be improved by conservative treatment such as local hot compresses and oral blood circulation medication such as Panax notoginseng tablets. If the nail peels off or is locally broken, you can give a bandage and change the medication regularly, often disinfected with iodine volts, with the tendency of infection can be used externally erythromycin cream or oral cephalosporin antibiotics, serious can be considered to remove the nail with comfrey oil sand applied externally, as long as the nail bed is intact will grow a new nail.