Bad tooth toothache should go to the hospital in time, the doctor will decide the treatment according to the specific cause of the patient, the cause of caries, endodontitis or periapical periodontitis, wisdom tooth pericoronitis, tooth sensitivity, etc., the treatment includes filling treatment, root canal treatment, removal of wisdom teeth, desensitization treatment and so on. 1. Dental caries: If the pain is caused by food impaction or cold irritation due to dental caries, the pain can be relieved by filling treatment, i.e. tooth filling. 2. Pulpitis or periapical inflammation: If the toothache is caused by pulpitis or periapical inflammation, the pain can be relieved by root canal treatment. 3. Wisdom tooth pericoronitis: If the toothache is caused by wisdom tooth pericoronitis, the wisdom tooth can be extracted after the acute inflammation is eliminated to relieve the pain. 4. Tooth sensitivity: If the symptoms are caused by dentin sensitivity, the pain can be relieved by corresponding desensitization treatment. Patients should follow the doctor’s instructions and actively cooperate with the doctor’s treatment, do not blindly treat yourself, so as not to delay the condition or cause adverse reactions.