In the clinic will encounter many patients ask how to brush the teeth when the toothache, usually toothache has the following situations: First, tooth sensitivity, such as periodontal disease patients gum recession (recession), root exposure will appear sensitive symptoms, usually will be coated with desensitizing drugs and then with desensitizing toothpaste to reduce the patient’s pain. Second, wedge-shaped defects in patients, some patients with enamel defects in the neck of the tooth, will appear in the process of brushing soreness, it is recommended to the hospital in a timely manner to fill the wedge-shaped defects can solve the problem of pain. Third, tooth abrasion, excessive tooth abrasion will appear painful symptoms, usually on the defective parts of the cavity filling, such as unconditional filling cavity and the patient and pain can be root canal treatment to completely solve the problem of pain.