When a nail breaks off from the center, general treatment, medication or adjunctive treatment is needed depending on the breakage and the severity of the damage. 1. General treatment: After the nail breaks off from the center, the broken part can be cut off with scissors to avoid scratching other objects that may cause pulling pain. Afterwards, disinfect the wound with iodine and then bandage it, and change the medicine regularly. The wound should not be touched with water for a short period of time to avoid secondary infection. 2. Medication: If the injury is serious, use iodophor to scrub and disinfect locally, then use gauze bandage and change the medication once every day. When the infection is serious and causes a systemic reaction, you can take oral cefixime, amoxicillin and other antibiotics. 3. Adjunctive treatment: when the nail gradually grows new tissue, you can apply vitamin E oil, can play a moisturizing effect. Nails broken from the center need to be observed, if you can not deal with it, it is recommended to consult a doctor in a timely manner. Nails should be trimmed regularly to avoid accidental injury if they are too long.