When a girl has a toothache during menstruation, the first thing to consider is that the hormone level in the body changes greatly during menstruation, which aggravates periodontitis and gingivitis, and increases the sensitivity of the teeth, thus producing pain. Secondly, it is considered that the teeth have organic diseases, such as dental caries or wisdom teeth eruption, because wisdom teeth eruption will cause pericoronitis and peripheral gap infection, inflammation and infection symptoms, severe toothache phenomenon, or the body by the hard food and hot and cold stimulation, resulting in tooth root fracture, crown fracture phenomenon, it is recommended that women with tooth pain go to the hospital for examination in a timely manner. If the symptoms are mild you can use anti-sensitivity toothpaste localized coated on the teeth, after a minute for brushing, while taking medication during menstruation, to be carried out under the guidance of a doctor, pay attention to a light diet, avoid spicy, stimulating relatively strong food.