Toenail smashed black may be between the nail bed and nail plate bruising, should go to the hospital in time to improve the relevant examination to clarify the condition and be corresponding treatment. Toenail smashed, the patient may appear to the toenail localized swelling, pain and other symptoms, it is recommended to improve the relevant examination, to avoid causing toe fracture. For the fracture of the toenail needs to be reset and fixed by manipulation, if there is localized bruising, the nail bed and the nail plate between the more solid, can be observed and dealt with, if the amount of bruising is large, and loosening, may need to be extracted. If the toenail is smashed and there is only localized bruising without fracture or separation of the nail bed, it can be treated conservatively with observation and cold compresses on the local swelling. Usually within 1~3 months, the newborn nail can grow out from the nail bed, when the newborn nail grows to a certain extent, the bruised nail plate will naturally fall off. However, if the extent of the bruised toenail is large and there is obvious loosening, nail extraction treatment is needed. If the amount of localized bruising increases, and there is infection or even pus under the nail, it is also necessary to remove the bruising after nail extraction and then carry out local drug changes to promote the healing of the wound. Patients with smashed toenails should consult a doctor in time, who will treat them according to the actual situation, so as not to delay the condition.