Tooth decay is generally called worm tooth or tooth decay, it is a bacterial disease, not a worm inside the tooth, if not timely treatment of tooth decay may lead to periodontal disease, may also cause other inflammatory diseases, need to timely treatment of tooth decay. Dental caries is caused by the dysbiosis of oral flora due to many reasons, the incidence is high, it is one of the common oral problems, it needs to be treated in time, the following ways are mostly used for treatment: 1.Medication: the main purpose of medication is to prevent the development of dental caries, it is suitable for the early stage of dental caries, the middle and late stage is not suitable for medication, it can only implement other ways for remedy. 2.Multiple filling treatment: The most used treatment method is silver amalgam filling, which has relatively good effect and can solve the problem of recurrence of caries at the same time, and resin filling can be chosen if it is posterior periodontal damage, which is relatively longer and lighter in wear. 3.Inlay: This kind of inlay is suitable for patients with large cavity and tooth fissure at the same time. To prevent tooth decay, we should do the habit of rinsing and brushing diligently, and the time of brushing should be more than 3 minutes in the morning and evening, and it is better to clean the teeth regularly.