Damage to the nail bed may be related to trauma, onychomycosis, nail fungus disease, etc. Different repair methods should be adopted according to different causes, and timely medical attention is recommended. 1. Trauma: the nail bed is damaged due to irritation or trauma in life, which is generally an epidermal injury and can usually be restored through self-repair and metabolism of the nail bed. 2. Nail groin infection: it is a common infectious disease on the surface of the body, which may lead to the damage of the nail bed in serious cases. It can be treated with medicines such as chlorhexidine solution under the guidance of doctors, or repaired and treated by abscess drainage, nail extraction and other surgical methods. 3. Nail fungus disease: Nail fungus disease caused by fungal infection, breeding may appear nail bed damage, can use amorolfine powder, itraconazole and other drugs for repair treatment. It is recommended to consult a doctor to determine the cause of the damage to the nail bed and to treat it under the doctor’s guidance.