Rotten teeth are called caries in medicine, when caries pain can be treated by tooth repair, root canal treatment, with medication and so on. 1. If the pain of caries is caused by the pain after eating too cold or too hot food stimulation, after examination does not lead to pulpitis, then the use of dental filling materials for repair filling, such as removing the decay of composite resin filling, can effectively relieve the symptoms of toothache. 2. However, if the patient has a toothache without receiving stimulation, it is usually due to dental caries that triggers pulpitis, periapical periodontitis, etc. The patient usually needs root canal treatment. Patients usually need to undergo root canal treatment, the main process is usually to take pictures to determine the treatment plan, after anesthesia to remove decayed dentin, take out the necrotic pulp, fill the root canal with materials, and finally fill the drilled hole in the tooth. 3. Patients can also use painkillers such as diclofenac sodium extended-release tablets and loxoprofen sodium tablets for pain relief, as well as metronidazole tablets for anti-infection during the treatment. However, drugs can only play a supporting role. If the patient has the symptoms of dental caries pain, should promptly consult a doctor for standardized treatment, do not blindly use drugs.