According to the degree of injury, local disinfection, surgical excision and tetanus prevention should be chosen. 1. Local disinfection: If the fingernail is injured by thorns, saline and iodine should be used to rinse and wipe the wound in time to avoid local infection. 2. Surgical excision: according to the type of thorns, surgical removal or excision can be chosen to ensure that the thorns are thoroughly removed to avoid the foreign body remaining in the tissues leading to foreign body reaction and infection. 3. Prevention of tetanus: If the local injury is deep, and the splinter is unclean or rusty metal, etc., intramuscular tetanus vaccine should be considered after full evaluation. The above treatment should be carried out under the guidance of a physician. If stabbed, one should go to the hospital in time to avoid aggravation of the injury.