Toothache should be treated with symptomatic pain relief methods according to the cause of the toothache. Root canal treatment can be used if it is caused by pulpitis or periapical inflammation, and desensitization treatment or resin filling is needed if it is caused by tooth sensitivity. 1. Pulpitis and periapical inflammation: Pulpitis refers to inflammatory lesions in the pulp of the tooth, and the patient will have clinical symptoms of tooth pain; while periapical inflammation refers to inflammatory diseases occurring in the tissues around the root tip of the tooth, and the patient will have clinical symptoms such as spontaneous tooth pain and occlusal pain, etc. Both of these two diseases can be treated by root canal therapy, which can provide pain relief from the root cause. 2. Tooth sensitivity: Tooth sensitivity refers to the transient, sharp pain or discomfort that occurs when the tooth is subjected to physiological range of stimuli, including mechanical, chemical, temperature and osmotic pressure, etc. It can be treated by desensitization therapy, resin filling, etc., so as to achieve pain relief. It is recommended that when patients have symptoms of toothache, they should go to the hospital to clarify the cause of the disease and under the guidance of the doctor for treatment.