Toothache after years of wearing braces may be related to physiologic causes such as pulling pain or pathologic causes such as periodontitis, pulpitis, crown root fracture, etc. 1. Physiological reasons: braces usually improve the symptoms of malocclusion by pulling on the teeth, and pain will occur during the pulling process. 2. Pathological reasons: If you suffer from periodontitis, you may experience toothache under the stimulation of inflammatory factors; if the pulp in the braces is attacked by inflammation and causes pulpitis, it may also lead to toothache. Pain may occur if the crown or root of the tooth is fractured, and the tooth cannot be retained if the root is fractured as deep as 3mm below the gums. It is recommended that people who have been wearing braces for many years with tooth pain go to a regular hospital in a timely manner to clarify the cause, and if treatment is needed, it should be standardized under the guidance of a doctor so as not to delay the condition and bring adverse effects to the body.