If the tooth above is broken and the tooth below hurts, it may be caused by pulpitis, hidden caries in the tooth below, or the tooth has been traumatized, etc. It is recommended to go to the hospital for specific examination and treatment.
If the upper tooth is broken and penetrates into the pulp, there will be radiating pain when pulpitis occurs, and it will hurt on one side of the face, especially in acute pulpitis when it is hard to tell which tooth hurts on the upper and lower jaws.
The lower teeth do not look bad on the surface, but may be bad on the adjacent surfaces of the teeth, hidden caries can not be seen on the surface, and pain may also occur.
Teeth that have been traumatized and have had concussion may also have a sudden onset of tooth pain even though there are no bad areas on the surface.