There are several possible causes of tooth bulging: 1. It may be apical inflammation, most of which requires root canal treatment to remove the nerve. 2. It may be gum inflammation, which is most likely related to poor oral hygiene habits and may not have the good habit of brushing teeth on time as well as rinsing the mouth after meals. It is recommended to go to the hospital as soon as possible to clean the teeth and remove the plaque from the mouth. 3. It may be an apical cyst, and if it is serious, the tooth may need to be extracted. However, it cannot be generalized, it is recommended to go to the hospital to take dental film for exact examination, simply by virtue of the bulge description cannot clarify the condition. In addition, it is recommended not to eat spicy and stimulating food in the near future, try to eat lightly, adjust the eating habits as well as work and rest time, and drink more water in general.