Children’s fillings are not harmful in themselves, some children may experience post-treatment toothache, but it is usually not serious and parents do not need to worry too much. Dental fillings are a common clinical treatment in dentistry, mainly by filling the defective parts of the patient’s teeth with resin and other materials to restore the normal appearance and function of the patient’s teeth. The technology of this treatment has been more mature, high security, so the treatment itself does not have harm, on the contrary, fillings are usually due to the presence of children with dental caries and other oral diseases, fillings can also prevent serious caries caused by pulpitis and other diseases. Although the filling itself is not harmful, but due to the treatment process in children’s teeth defects need to be sterilized and filled with artificial substances, disinfection drugs and fillings may cause irritation to the children’s dental pulp, resulting in postoperative toothache in children, the phenomenon is a common postoperative clinical reaction, the general pain is not strong, and will gradually get better. To summarize, there is no obvious harm to children’s dental fillings, it is recommended that if children have caries, missing teeth, etc., take children to the doctor in time to avoid affecting the normal chewing function of children.