The cat scratched with a faint red mark without breaking the skin, although the damage can not be seen with the naked eye, but it does not exclude the occurrence of tiny breaks. Patients can avoid infection by local disinfection and rabies vaccination. 1. Local disinfection: patients can use water or hydrogen peroxide to clean the local area, and use iodophor to disinfect the local area after cleaning to avoid secondary infection. 2. Injection of rabies vaccine: when the skin has a small rupture after being scratched, go to the hospital in time for rabies vaccination. When the patient is scratched by a cat with a faint red mark without skin, should be diagnosed by a doctor, rabies vaccine injection.