It is not recommended to fill cavities by oneself. Filling cavities, i.e. filling treatment, needs to be carried out in a formal medical institution under the treatment of a professional doctor, and self-operation may produce infection, trauma and other adverse effects. 1. Infection: regular filling treatment needs to be carried out in aseptic conditions, the instruments used are strictly disinfected and sterilized, otherwise the bacteria and viruses on the surface of the instruments may lead to cross-infection. 2. Trauma: regular filling treatment requires the use of professional instruments to prepare the cavity, and then the composite resin will be bonded and cured, and finally the filling body will be shaped and polished. Inadequate handling may result in pulp penetration or occlusal trauma. If you need to carry out filling treatment, it is recommended to go to the hospital in a timely manner, with the help of a doctor to carry out standardized treatment, do not operate on your own.