When the nail is empty after bruising, it should be removed as soon as possible, because bruised nails can easily lead to hematoma or secondary infection under the nail bed. Therefore, for bruised nails, especially if the surface has become empty, try to ask a specialist to carry out nail extraction surgery. After nail extraction, you can apply iodized povidone or anti-inflammatory ointment, such as erythromycin ointment, on the local surface, followed by a pressure bandage, which can prevent infection and reduce the possibility of bleeding. Meanwhile, the dressing of the incision should be changed regularly every day or every other day to check whether there is bleeding or infection. In short, after the nail bruises, must go to the regular hospital for detailed examination, according to the specific circumstances to take the appropriate treatment program.